Monkey Ace with Neva-Miss Targeting pretty much destroys all bloons except lead and MOAB+ bloons. Their range is the entire map like snipers except more shots
Tip to getting higher waves (that worked with me anyways):
Do hard and keep repeating it. Short and fast. Can get cubes faster that way. Investing most of it into Resource/Wave and Resource bonus, trust me the more money you have, the easier it is to get more cubes. Some time later, start investing it into attack per seconds and a few attacks. Then rapid fire, bounce, and multishots %. Rapid fire, bounce, and multishot % and # should be maxed before moving on. At this point, you should be at around 50 waves ish on hard. Just keep doing it in useful offensive abilities and utility stuff. Only thing you need for defence right now is health and regen.
Doing it on normal difficulty can get you so far in the number of waves you get. Easy difficulty would basically take forever lol. Hard is meh. Expected.
Need a x8, x16, x32, etc speed up or an auto skip feature .-. Sooooo glad the bug was fixed. I'm fine with how it is now. Just too slow lol. But then again, it IS an Idle game... Meh. We'll see how it goes.
I think you should have kept the old system with how much each upgrades cost and then change how much of an upgrade it was. For example, before this, attack only went up by .5 per upgrade and attack speed by .1 per upgrade. Now however, attack is by 1 per while attack speed is .05 per with wayyyy more cost to it. Easier to get overwhelmed now since tower can't keep up.
So the bug was fixed. I opened the game and saw I had 12k click. I decided to use it. Left for about an hour, came back, screen froze so I hit recover. Next thing I know, it resets my entire progress -.-
 "Bloons Monkey City"){kind=icon}
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yes :P Managers :)