anyway ( ps: ive only played mage and paladin aka magic-focused class, i was a warlock for sometimes but have forgotten most of it by now )
get a decent pc and wifi, you cannot pvp for the love god without those due to how fast paced combat can get in this game ( unless you’re fighting people at low-medium-ish skill range, which should be okay )
try to get to high ground ( or just t jump before attacking, and keep attacking while you’re in the air since a lot of people seems pretty damn bad at aiming people while they;re in the air compared to when they’re on the ground, it also help you aim better too )
depending on your build, if you’re glass cannon then just do the above and dash away to regen energy ( you can regen energy while falling mid air ). If your magic is something like earth, metal, poison, ash or anything that create a bunch of dust/“smokescreen” then its even more useful since you’ll able to have even more time to regen energy ( unless they’re using revealing, tho i doubt it since they would probably use something to boost their dmg instead )
otherwise its probably better to learn how to block/parry and punish them. Trading blows is an option if you think you can outdamage/tank them, tho it usually only works if they fight in close/medium range from what ive seen
idrk how to play tank tbh since they arent really a very viable option rn in both pvp and pve imo, some meta mages can deal 400-600 ( not counting dot ) in one hit so trying to tank them is just a bad idea, and you lack the dmg to do meaningful dmg to them
if potion is allowed, bleeding is probably your best friend since bone ( teeth? i dont remeber whats used to make them tbh ) since it sygnerizes with quite a lot of thing and can help if your magic/fs deal low-medium dmg
try to, learn how to stay calm because throwing everything out and hope it works isnt a very good idea ( unless you;re a metal mage with 500 size then yeah, it works most of the time actually )