Easy line Q-E-W-W-E-R-W-W
Ogre Magi
Easy line Q-W-Q-E-R-Q-W-Q
Like that combo?

Early rape, late destruction

Slow plus stun from ogre, as well as the stun from sven makes ganks very successful. Ogre's regen means he can provide a solid lane presence against the enemy offlane, giving sven free farm. Late in the game, ogre's bloodlust makes sven unstoppable