Hello!
I just completed Act 5, and I am wondering how I should progress further (what content to do)? I would like to approach act 6.1 in the upcoming summer. I have attempted Variant 4, and I have been able to get through the first 4 fights with only She-Hulk (those were probably some of the best fights I have done), but I didn't continue since I was saving revives for 5.3 and 5.4 (though I only used 5). I found that I couldn't do the first fight in Variant 3 (the wasp), but I have a Sentinel at 2/35.
I would say I am an average player. I can parry and dex (of course), and sometimes (50% of the time) I go try hard and bust out those intercepts and sidesteps from Instinctive Touch. Are there any other skills I should learn?
How should I progress my roster? Currently I can take three champs to rank four, since I have 12 tier two alpha. I don't know who I should take up from my roster (image below). I will be getting my first 6 star this month, but I don't know if that will affect my rank up decisions (since I can't expect a useful champ).




Some more questions...
What to use the chronometer for in the rifts? Mutant awakening gem? 10k 5 star shards? Don't even get the chronometer? (Note: I don't grind the game much, and I don't do arena, so I won't have enough units for all the sig stone offers).
Should I look to get suicide masteries, or look to save up for Cyber Weekend? Again, units are scarce for me since I neither have the time nor the roster to attempt an infinite streak in any arena besides Summoner Trials

Any help would be appreciated, since I came back pretty recently in March, and I don't know much about how progression has changed.