I think Pioneer and Breaker 9 can stay, just make limitbreaker like 1 step better (say 1 extra bag of ammo or 1 extra bullet per slot)
edit:
Breaker 9 - 1000 delay - 9 damage - 60 ctrl - 5 maxmag - 25 maxbullet - reload 5 - lvl 60
Pioneer - 1000 delay - 9 damage - 70 ctrl - 6 maxmag - 30 maxbullet - reload 6 - lvl 40 (think this was a premium on ijji)
Also your stats of donation vs non donation is sort of off, basic donation should be equal to high lvl (90+) that has no lvl requirement where Limitbreaker should be a tad better (extra mag and more ctrl or something with a tad less delay 50 or so, X version should be +1 of the regular, or roll them around and make the LB X like a Avenger MK II with 2 bullets but 12 dmg isntead of 11?)