Best element is earth cos of the spoil. When u enchant spoil, it lands a debuff that has earth atribute, so u should go for that, and also cos stuns are earth based (rumours, I didnt confirm myself).
Dyes...no dyes or -CON +STR all the way
well spoil crush will make damage I think, dont know if spoil bomb will, just try in arena or smth..
Your weakness are the nukers, obviously cos of low MEN, low Mdef and lack os passives. The figters u can handle since u have tons of HP+hvy armor mastery, and specialy the close range ones dont stand much of a chance since they get stun-locked, unless 1)titan in frenzy, 2)tyrant in zealot, 3)dagger in UE/ea/wr/gw. But nukers will tear u apart, not only cos of the low Mdef but also cos they'll slow u to death, cancel etc and then ur facked and u have nowhere to run ^^
As for mass pvp. Archer/nuker dorf pwnz
Oly...stun stun stun stun stun stun and hope to win xD