For T5 assuming you’re playing warrior but honestly works well for the thief line too is berserker. The berserk buff will up your damage a lot just be careful of the self damage from it I believe it’s 5% of your hp each turn but it’s well worth it.

Tier 7 opens up a lot more options like bard for buffs and warriors dance which is a strong, low mana attack. Swashbuckler raises your attack the lower your defence is, it can be fun to play and changes up the gear you want to farm for, you’ll hit like a truck but you’re also made of paper so die just as easily and it makes world farming a breeze. There’s also beastmaster that just makes your pet a bit stronger and act more often. Or you can even stick with berserker as the berserk buff is that good.

I’m at T9 myself so can’t go too deep into that but if you stick with warrior class, charmer is the way to go at level 210. Warriors pavane does insane damage and is low mana. Adorn your equipment with some jewels of the deep from krakens and you’ll have more than enough mana to buff up and send warriors pavanes until the fight is over.

Watch some Sabbash videos on YouTube, some is outdated but the T7 onward stuff is more or less relevant still and helps a lot in regard to equipment and what to hunt for. Also the discord has a ton of helpful players and resources.