Tower Fusion (BTD7PotA)

Tower Fusion is a Game Mechanic in BTD7: Planet of the Apes. It was inspired by a concept made by KillerKraken.

Summary
Tower Fusion is a mechanic where you fuse two towers into one, combining their attack capabilities and making them stronger. There are two types of fusion: Homogeneous and Heterogeneous Fusion. Rules exist governing fusion and its types, as shown in the section below.

General Rules

 * Only 2 towers can be fused together at any given time.
 * Only 4 Fusions can exist on the track at any given time.
 * Only Tier 4 or Tier 5 Towers can be fused together. Tier 6 Towers cannot be fused.
 * Once a Fusion is made, the Fusion Tower cannot be further upgraded by any means. That also means you cannot further fuse a Fusion Tower.
 * The cost to fuse is the sum of the total costs of the two towers fused together.
 * The towers being fused must be in close proximity to each other.
 * Heroes cannot be fused by any means.

Homogeneous
Homogeneous Fusion is the fusing together of two of the same tower. The rules governing this are shown below:
 * You cannot fuse towers whose upgrade path with the highest-tier upgrades are the same. For example, you cannot fuse together a 4/x/x Super Monkey and a 5/x/x Super Monkey together.

Heterogeneous
Heterogeneous fusion is the fusion of towers with another different tower (e.g. a Dart Monkey with a Ninja Monkey). The rules governing this are shown below:
 * You cannot fuse organic towers with mechanical towers, or vice versa. For example, you can't fuse a Boomerang Thrower with a Bomb Shooter. The only exceptions are Monkey Cyborgs and the Tech Terror path for the Super Monkey.
 * The following towers cannot be fused with different towers: Banana Farm, Monkey Village, Farmer Monkey.

Fusion Tower Combinations
Fusion towers are the finished products of the Fusion process. Here are the possible combinations: (WIP)

Dart Monkey

 * Juggerbow Master
 * Plasma Monkey Juggerclub
 * Plasma Monkey Crossbow Club

Tack Shooter
(WIP)

Heterogeneous
(WIP)