Suppose A is supported by B and C
1️⃣ A needs to support D, the first thing they need to do is contact B and C and ask them to remove support. If one of them is unavailable, then good luck
Solution: when A tries to support D, the support from B and C should be auto-removed
2️⃣E with higher level CR gets into support range and tries to support A or B, then still, good luck contacting everyone
Solution: for A, remove the lower level support, for B, remove the support mode
Also add an auto-remove toggle like stealth and vengeance