I always hoped Azir would of fit the APC bot lane roll.
Let his soldiers apply on hit effects. Reduce their damage assuming the Azir is going to have Nashers. This would delay his early game as an ADC should/would be.
Problem comes with Lichbane. Perhaps have an interaction like Sated where abilities that apply on hit attacks don't proc it. Although his soldiers apparently do get the benefit of sated now, that's because they are like a modified AA to him. But since he doesn't actually attack, Lichbane wouldn't go off.
Cass could get similar treatment to enrage bot lane, but Riot's done her enough damage as a "poison mage". So should probably stay way from her.
Not sure about Ryze. I don't really consider him an APC anymore. He doesn't build tanky while still maintaining high damage like he used to.
Other champions could get this too, mainly ones you don't see mid or ones who have trouble mid:
- Veigar - W can now harm towers, obviously not as strong. Unsure how to weaken his already poor early game. Otherwise this just buffs mid lane.
- Anivia - E's crit damage is now 60/70/80/90/100% damage on frosted targets to slow early game power. Using R under a tower deals damage to the tower, but only if it deals damage to nothing else.
- Karthus - Q now has no cast time, but every extra cast within 3 seconds adds a short cast time, stacking up to two times(will be current cast time at two uses). Using W on a tower will allow his basic attacks to deal bonus magic damage to the tower. AP scaling on abilities lowered. Now gains 2+1% per level AP scaling to all abilities passively.
- Ryze - Ehh... not really sure how I'd tackle this one. His point and click CC may be a bit too toxic for bot lane anyway.