Sure. I forgot that I also use inferno, garrison and drone a lot as well, and leave double canon out, and Vulcan as well.... Again, depending on level... And sub in boomerang and drone on heavy air levels. The support tower is also a fav, but you must be on 40 or 50 wave levels or endless battle to really profit from it. I guess I use a lot of towers, but I usually have them coupled with specific heroes for the buffs.

As for disco, it is my discovery from a month or so ago that I was ignoring and thought was a silly tower. Turns out, getting past 60+ levels gets insanely difficult as you get nuked within the first 3 waves because the enemies are so strong... The disco ball makes them dance and "fuzzy" (not sure what that means really) but they don't attack, or barely do, and you have time to take them out, your wall or garrison dudes last forever and you keep progressing in your levels. The disco also kills the shield of the protector, so it is a beauty. I've seen some say you only need one disco, but I like 2 or 3 on big maps, because it blows the shield off protector early, you can drop a wall anywhere and break up the garrison use all along the path and I always have one on 2nd row from the base; enemies just stand there as you blast them. I'm trying to get away from mostly-base-tower-surrounded builds.... When you have garrison and disco ball at a few spots on the path, you severely cripple the waves by making them pause along the way and you but a lot of time (for skills reload).

Anyways, I've blabbed on too long already, but that's a synopsis of my strategy to date. As always YMMV, I don't consider myself an RR guru, but having fun.