As a response to ArcticWolf54 and Madhouse1's latest comments, I can give these answers:
Magic:
-Sheep Burner.Even though the charge attack deals 30, it has mostruous range, like the whole arena, I think, plus, it's really, REALLY hard to escape it, provided it is aimed right, which even so, is not a biggie.The Midball Explosion upgrade can be quite nifty, because as long as the opponent is in range, it's just hard to avoid it.
-Channeler.Just...probably one of those one would send into the God tier(will someone also give me a link or something to this tier thingy, please?).The main reason?Boosted+repeated Magic Bombs.Coming in clusters of 3(sorry not clusters, but one after the other), it's really hard to approach him.Plus, the cooldown between repetitions is quite short, compared to the magnitude of the attack.Also, the Eldritch Beam has more range and damage, though I'm not sure about the latter.
-Ultimate Spinner.It just plain does a heap of damage.This is all I can say.
-Marauder.The combos and the Zipline axe upgrade speak for themselves.
Earth:
-Either one.You can choose between a charge attack that does 240+a standard attack that does 80+a stone projection that does 60, or a fast, awesome roll that does 41 damage and is actually capable of following up with a 50 damage Tail swipe right away.
-I like both paths, though Earthen Avenger should be used against enemies who have insignificant or no means to hurt you from a distance(like Chop Chop, if you maneuver around Bone Brambles well), while GBM, which does the exact opposite:is a good ranged fighter, and completely screws projectile-"addicted" Characters by deflecting them with the shield.
-Crystaleer.The super Crystal Eruption is a weapon of grand magnitude.Plus you summon 3 crystals, which, combined with the beam, can refract the beam and transform it into a prison.
-Sandhog.It accelarates your swimming, makes the mini-sharks home in, plus makes the fin do 15 damage while in swim mode.
Water:
-From what I heard, Blizzard Brawler makes him a beast.Don't know much about Glacier Yeti but sounds cool too.
-Slime Serpent I guess.I don't like either path.Slime is more fun.
-Either.See my review on page 22.
-Either.Depends on whether you want to enhance your harpoons or your hose and water capacity.
Well, that's it for the first 3 elements.Sorry I could say more but i really have to go to sleep.