Trundle: A minor change to his ult.
Trundle is in a decent spot, over-all. However I think his ult could use one change. Due to his nature as an anti-tank you almost never cast your ultimate on an enemy with low resistances. Because of this, the heal he gets from his ultimate is Negligible.
My suggestion would be to separate the calculations for damage dealt and amount healed. This way, even if the target reduces the over-all damage of Subjugate by half, Trundle still gets a meaningful heal of 35%.
This could easily be countered by
or
while making him a much more threatening Anti-tank, otherwise.