Name locking with channeled skills removal help plz

So I put together a build using incinerate and so far have been able to kill chimera and hydra. Was working towards buying other maps to do the rest.

BUT

Latest patch I can no longer name lock targets. This isn't too much of a problem with packs.

BUT

Against single targets sometimes their position on screen isn't the same server side. This means I can channel and aim at them and cast until I have no mana and deal zero damage to them.

Previously I was able to namelock them and I'm guessing server side my incinerate stream followed the target even if client side it was aiming in a different direction. Loot would sometime drop in directions way off to the side after I killed it.

But yeah, now my build is utter cancer and often I can't kill single crabs because I can't damage them where they stand and can't find where they exist server side.

My boss killer can't deal single target damage anymore :(. Is there anyway to turn this back on? I also suspect it would be aids for the new channeled skills too.