You're doing the fusion on 3 accounts? Wtf man.
I'm getting it but just doing it on one account had been a huge pain in the ass.

Yea, I think you are kind of digging your own hole here trying to maintain 3 accounts, all of which are/were in gold 4?  You are probably already doing better than most other people who are still stuck in bronze.

I'm not gonna lie, I was comfortably sitting in G4 for months before the recent arena changes, which pushed me down to S4, where I struggled a lot.  I then cleaned up my account and got rid of all rares/epics that I had no intention if using, which dropped by player power down by about 300K.  

Since then, I have been having a much better time at finding battles that I can win.  It's still a challenge, but it's not impossible.  I also don't have Arbiter either, and using Fu-Shan for the speed aura.  Neither of these 2 arena tournaments were a problem, all from Silver 4.  I finished both in 1 day

I guess what I'm saying is it might be worth checking your player power, and also not be afraid of falling back down a few arena levels if it means easier matches.  Trying to hold your ground in Gold just for the sake of it doesn't sound rewarding if you are bashing your head against the wall and threatening to quit?

Yeah, 3 accounbts is too much nowadays with the advancedquests. After this fusion I was planning to put 1-2 on the backburner, just do their dailies excl. the advanced ones and build some sub-optimal champs to see what they actually do at level 60. E.a. experiment, have fun. But I do want to complete this fusion as I already put a LOT of effort into it, but may end up dropping all my accounts all together. Like you said, I do not like getting annoyed over a game like this at all. But I am frequently getting annoyed with the way plarium runs this game, especially as they do not seem to care what their community is giving back as feedback.