As you may can read out of the title, i play Galio as an AP-Carry in mid. It also is common to play Galio top lane, but i will focus on mid. Basicly Galio has a very strong laning phase, but he also is very usefull in teamfights. Note: You want to play him mid, if you have a squishy top laner or a squishy jungler (e.g. Fiddlesticks).
This is a standard mage page with the magic pen reds, which dont really need to be explained. For yellows I prefer hp/lvl over manaregen, because mana wont be a big issue. Some people like to take AP/lvl blues, but with your passive you want to get the magic resist blues. You have more then one option when it comes to quints. I often use flat AP or magic resist, but if you feel like taking HP, this also will work.
[title][img=skills/galio/p.png] Passive: Runic Skin[/title] [number]Galio converts 50% of his total Magic Resistance into Ability Power.[/number] [title]Explanation:[/title] Very good passive, which makes you a good mid laner. You get tankier vs mages, while getting more damage. This also is a reason why you try to get a lot of items with mr. If you use AP quints and Magic Resist Blues, this will get you 59 AP lvl 1, while also having 73 mr. [title][img=skills/galio/q.png] Q: Resolute Smite[/title] [number]Galio fires a concussive blast from his eyes, dealing 80/135/190/245/300 (+70% of ability power) magic damage to enemies near the impact location, and reducing their movement speed by 24 / 28 / 32 / 36 / 40% for 2.5 seconds. Cost 60/65/70/75/80 mana Range 900 [/number] [title]Explanation:[/title] You will use this skill to farm the caster minions in lane or to harass your enemy. Also very good for chasing an oponent. Note: With only 60 mana cost lvl 1, a 2.5 seconds slow and 7 seconds cooldown, while having ~120 damage, this spell is really good in lvl 1 fights. [title][img=skills/galio/w.png] W: Bulwark[/title] [number]Galio shields a friendly champion for 3.5 seconds, increasing their Armor and Magic Resistance by 30 / 45 / 60 / 75 / 90. Each time the unit suffers damage, Galio is healed for 25/40/55/70/85 (+30% of ability power) (-20% healing for each consecutive hit). Cost 60mana Range 800[/number] [title]Explanation:[/title] This Skill gives u some lane sustain, works very good with your ultimate and also is worth to put on the one focused if you are low hp, because the healing actually is pretty decent. Note: The shield really can help protecting your AD-Carry, so try to shield him if you can. [title][img=skills/galio/e.png] E: Righteous Gust[/title] [number]Galio unleashes a gust of concussive wind that deals 60/105/150/195/240 (+80% of ability power) magic damage to all enemies in its path. A directional draft remains for 5 seconds, increasing the movement speed of allies passing through it by 20/28/36/44/52%. Cost 70 / 75 / 80 / 85 / 90 mana Range 10000 [/number] [title]Explanation:[/title] Works good with your Q and gives you a pretty decent combo in lane. Note: The movement speed buff is surprisingly good, remember that and use this spell if you want to engage or run away. [title][img=skills/galio/r.png] R: Idol of Durand[/title] [number]Galio channels for 2.5 seconds, taunting nearby foes and blocking 50% of incoming damage. After channeling, Galio deals 220 / 330 / 440 (+85% of ability power) magic damage to surrounding enemies, plus an additional 10% damage for each attack he suffered while channeling. Max 80% bonus damage. Cost 100 / 145 / 190 mana Range 550 [/number] [title]Explanation:[/title] Extremely good ultimate, which automaticly protects your carry and also deals very decent damage to the enemy one. Note: For this skill, positioning is extremely important. You want to hit as many targets as possible. [title]Skill Order[/title] [imgsmall=skills/galio/r.png] > [imgsmall=skills/galio/q.png] > [imgsmall=skills/galio/e.png] >[imgsmall=skills/galio/w.png] You max your Q for the lane harass and the E for the movement speed and the combo.
You try to get [imgsmall=items/chalice-of-harmony.png] as early as possible, because it allows you to spam Q and farm better. For Boots i take [imgsmall=items/mercurys-treads.png], because it gives you magic resist. The tenacy is more like a bonus. What you get next depends on the situation: [img=items/banshees-veil.png] If you want to get tankier. Also the shield is nice to have. [img=items/rabadons-deathcap.png] If you want to deal more damage. [img=items/abyssal-scepter.png] If you want to get more damage, while getting tankier. [img=items/void-staff.png] If the enemy stacks mr. Other good options are: [img=items/force-of-nature.png] If you feel like getting to much magic damage. [img=items/zhonyas-hourglass.png] This would give you some AP and a decent amount of armor + the awesome active. [img=items/thornmail.png] If you face AD heavy teams. [img=items/guardian-angel.png] If you want to get better defensive stats. You can sell your [imgsmall=items/chalice-of-harmony.png] if it comes to lategame, because you hopefully will get blue buffs now and you can go ahead and get something better.
In this part of the game you want to farm as much as possible, while harassing your enemy, so he cant farm. It is worth to use your TP, after you went back the first time (for Chalice and Boots), so you dont miss any farm. After lvl 5 your combo should do enough damage to kill the caster minions, so farming gets easier. But dont use this to often, if you dont want to overpush your lane and get vulnerable for ganks. After you hit lvl 6 it is worth for your jungler to come and gank, since you have the 2.5 sec cc now and a decent slow. After you cleared the minions, you can easyly take the wraith without leaving your lane, just use Q + E.
This is when teamfighting starts and your ultimate begins to shine. Make sure you have a ward at dragon, so you can tp in and ult at any time. An other option to use your TP is, to ask your bot lane to ward a side brush and as soon as the enemy bot lane pushes a little bit to far, you teleport in and use ur ulti. This usually gets your team two kills or burns some summoner spells at least. Other then that you just want to sit in lane and farm as much as you can.
When lategame starts, due to your good farm you should be very tanky and deal a decent amount of damage. Now you want to have the ward in the baron pit, so you can TP in and ult. With summoner TP up, you are also the one to defend other lanes, since you clear minion waves really fast. If you do this, make sure you have good wards close to your team, so you always can teleport to them. At this point dont forget to use your E to speed up yourself and your mates for better movement.
In Teamfights Galio can play a very big role. When the teamfight starts, you want to shield urself (W) and use your Ultimate on as many enemys as possible. This will give your Carry(s) time to deal good damage, while the enemy cant really do much. To get in a good position, it is worth to use Summoner Flash. After you popped your ultimate, you should try to hit the squishy targets with your Q and try to use the E to get yourself or your teammates into better positions. This spell can also be very usefull to get away or to chase. Note: Don't forget to shield up your teammates, so you will get some heal.