I have 7 heros and they all are good. I'm wondering who to keep for my main team. I have Abyss Demon (keeping), Pan Goli, Blockhead, Arctic Lord, Won Ton, Rath and Bullhead.
Bull and Block are probably best left as hero aids, but that's it. Bull increases the enemy's dmg taken, which is useful in gb and br, as well as buildings in gc when you have wolf in wolf form
Main team: Abyss, PG, WonTon, Rath, BullHead.
Aid: Blockhead on your Abyss to boost ATK rate, to boost the healing effect. Arctic Lord is pretty rubbish as a main hero, or as an aid. Don't invest any more in your Arctic Lord.