second stage again, modified strategy. use the bottom pink flower.
level range and rate about equally, but also dump ALOT into max units. dont remember the amount, the the max unit upgrade cost 65 by the end.
hp is useless, the hand guy does 100 damage, with super high range and piercing.
goal is every time a unit dies, replace it with a new one. keep sending one in each lane. when one dies, and the hand projectile is not in the way, send a new one in that lane.
eventually your range and army size will allow you to kill the hand guy, once that happens all you need is enough leftover units to dump into the empty lanes. i won at run 12.
ranged units are king.
find the best one. hierarchy is: best-anything with piercing, next whichever has the highest starting range, last if all else equal is whichever has a damage upgrade
tailor your strategy to the ranged enemies that exist.
low range, low damage? try scaling hp or just outrange them.
high range, piercing? overwhlem them with numbers but dont let them pierce multiple targets at once. one unit in a lane at a time. employ distraction as they will always attack the closest target. build up your range until you can kill the dangerous enemy while it is busy attacking something in another lane.