In what stat should i focus?

Currently im focusing in Magic power but i don’t know if i should focus in other stats too.

Focus into power and defense, unless you want to put everything into either one of those categories

either full strength, full defense, or some sort of balance between those
everything else is irrelevant as of now

Personally I’m going for a tank build as my guildmates are planning to run dps and support builds, so I go full defense. It also heavily depends on your playstyle, too.

I’d recommend balancing it out between power and defense. Power is to kill people as fast as possible before they hurt you, and defense for when they do manage to hurt you. You can always change playstyles between battles too, so take advantage of that.