Campaign strategy - wait to 2 champ it for 3-stars or go with 4 champs for 2/1 star?
I'm about to star NM campaign and was wondering the best strategy. I did Hard mode w/ mostly 2 champs and got a sacred, did most of Brutal with 2 but had to go 4 during last two stages. About to start NM, but I don't have any 6 star champs and no Legos, so i'm pretty weak for NM I think. Should I wait to take on NM with a couple of geared 6 stars for the rewards or motor on w/ 4 50s?
I'm griding to ascend Kael to 6 right now and its a bitch...the thought of grind to get another is not appealing.
Thoughts?