no problem dude
this may be the case for barbarians but once you take into account troops like valks which have 900+ health each and 88 damage then casting multiple shrinks would not lower the health enough to make splash damage come anywhere close to being able to keep up however their already high damage (88+) would be raised well above 300 damage.
a level one valk would have 225 health and 352 damage per second and would as per their ai take out a couple building at once. This is why I suggested that this spell should not stack, it would make it incredibly easy to take out even a maxed th10 with even low leveled troops since the sheer number created from stacked spells would be perfect for overwhelming inferno towers and the troops not targeted by infernos could still be healed to protect them from wizard towers.




