I really like this game. I get to deliver mass bloonstruction with incredibly powerful weapons. Currently waiting for the release of the final section of Helium Heights, into the volcano, to level 100. Meanwhile, I'm upgrading all of my monkeys, and currently have everything for the Super and Ice Monkeys, and am working on Storm. I'm also ranking up powerups to make them even more potent.
I don't use the activated powerups, simply because they are one use. If they had a cooldown like the Epic weapons, then I'd probably use them more. The two constant powerups I don't use are the Invisibility Cloak and Phase Scanner, simply because I prefer to burn the bloons down, and a different powerup could help with that. Though I might use them when going for Diamond.
Something clever you did when I used Singeing Shots and Sticky Shots together. Sticky Shots becomes corrosive and does damage by itself when it reaches rank 4, but stacking it with Singeing Shots makes it that instead of regular glue and fire, it looks like corrosive glue.
Maybe there could be 3 more monkeys, each with a weapon type replacing the other 3 original weapon types. The Super Monkey is the base monkey, with the 5 weapon types from the original flash version of this game. The Ice Monkey has the Ice weapon replacing the Dart weapon. The Storm Monkey has the Storm weapon replacing the Magic weapon type. I have the same basic weapon setup for each monkey, with a Magic left arm, a Bomb right arm, and Dart core, replacing the Magic and Dart with Storm and Ice on their respective monkeys. The change in weapon slightly alters how it works compared to the Super Monkey.
Having a monkey replacing each weapon type once would really be interesting. I only have an idea for a replacement for the Bomb weapon, being the Fire Monkey. Fire weapons would probably have significant trouble against MOAB-Class bloons, in exchange for no weaknesses. And a bonus of the fact that the next section of Helium Heights is at a volcano makes this more likely to be added first compared to the replacements of the Rang and Energy weapons.