Mixagons are fusions of two tier 5 towers. They are weaker than paragons and do not consume any other towers, but are still very powerful. They generally cost around the sum of the costs of both tier 5 tower upgrades. The (constantly evolving) list is below. Anyone can create their own Mixagons, follow wiki rules, it is okay if there are multiple Mixagons for the same combo.
F.I.R.E.B.A.T. [ShimmeringSapphireCat][]
The F.I.R.E.B.A.T. is a Mixagon combining the 5/0/0 Sniper Monkey (Cripple MOAB) with the 5/0/0 Tack Shooter (Inferno Ring). Its name stands for the Flaming Incredible Ranger Executing Burning And Tiring. It is a giant Inferno Ring machine with an open-air swiveling cockpit on top, with a monkey sitting in the cockpit, camouflaged by rocks, with a large visor. There is a large gun mounted on the swiveling cockpit, which acts like a Cripple MOAB gun, but it has two barrels, and both barrels shoot flaming crippling powerful bullets. The F.I.R.E.B.A.T. also works as a more powerful and bigger Inferno Ring.