How to buff Ivern!
Give him 2/2.5/3/3.5/4% health damage on his autos in brush. So you walk up to overextended enemy. Put down brush. Auto, then Q when he walks back or after dash (targeted not effective since you in bush unless they blow ward), keep autoing and boom you do like 20% health damage + Q and E with ally. Build him full tank maybe like Rod or something but use your survivability to kill enemies not damage. So full tank and % health autos in bush. Easy fix, hopefully not broken with bork and/or bloodrazor but then you really squish so might work really well.
His obvious power spikes would be lvl 3, 6 and early and mid but still have purpose of vision denial and engaging in teamfights or following up CC. Would that work?