Some remaining questions for an intermediate F2P player

First of all read this:

Next I’ll respond in short your questions. For details read above links.

Yes, it matters: some heroes (opponent) hit 3 nearby heroes, some heroes (your) heal left and right only etc

Epic Hero Tokens help you get a hero only from Epic Hero Summon (not elemental summon, challenge event summon); however this EHT can be used when there is a seasonal event (rabbits, summer, halloween, xmas) which last 1 month each.
Epic Troop Token is for Troops. Period. Troop<>Hero - different things.

When it burns it means next time he will hit you. Numbers means turns until he hits you. ‘S’ means he will hit you with special.

Read the links above.

I would go: Grimm-Rigard-Onatel-Boldtusk-Gobbler

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