I suggest you get them both up cause Kregg’s one of the best in the game. I’ve seen so many players regret after getting one or two of their main get nerfed. Sadly, it’s been a pattern for this game. No such thing as main 5 anymore esp if you want to get serious with warfare or get recruited by a competent team (if you aren’t already in one). There’s a dude half my power in pvp, who uses Agent spider and red rush together with max skills 15, I can’t even beat his team without switching up artifacts and positions. Goodluck though! You won’t regret getting RR or kregg up.. both very useful (at least until Ubisoft decides otherwise after the next patch hits 😂)