Ares, Chains Everywhere

Open with Boots of Celerity lvl 2, 5 health, and 5 mana pots. start with skackles at level 1 and max this first, pick up searing flesh second and max this second, obviously pick up your ult as available, ignore bolster defenses until you have to put points into it. Your core items will be Void Stone first followed by Mystic Mark, finish these in that order, do not half build each to ensure you get stacks on your passive as soon as possible. Sovereignty and Pythagorem's Piece are both good pickups to get more stacks on the passive (Pythagorem's Piece is optional based on your/their team Witch Stone is a good alternative) Finally I like to get a Rod of Tahuti if the game runs long enough so that your damage stays high since the enemies will most likely have beads you want your ult to still do something in the fight.

Ares should be played as an aggressive support to any carry in a side lane, buy abilities to enhance your teams abilities, instead of yours, if need be buy beads/aegis but it isn't necessary.

Remember extremely important
Keep potions on you at all times, never be caught leaving base without mana potions.