Board Thread:Game Discussion/@comment-9890645-20150213121239/@comment-9890645-20150219141336

Two things about combiners:

1. There is a limit of one combiner per team in the English version because many Chinese players set up those 3 combiner teams, making PVP into Combiner Wars.

2. While Devastator has been very useful to me early in the game, I'm at a point now where, despite having raised him to SS-class and doing all sorts of maxing on him... I replaced him with 3 S-class characters that are 10 levels lower than the rest of my team (and -35k to my TP), and it hasn't changed my ability to progress. (NB: It may help that two of the three replacements - Mirage and Sunstorm - also have "attack all" abilities.)