If the enemy has a Magnus, it's likely that they'll go either for teamfights or someone who can be everywhere at once (Tinker/Furion). Splitpush splitpush splitpush.
They're also very likely to congregate onto the RP location once it is finished, ripe for Golems, Black Holes, tornadoes, what have you. It's not so much a bullshit skill as Skewer is way too much free mobility for him.