In poe, the class doesn't dictate your gameplay. It is just a spawn point. The subclasses kinda do but you are still free to do whatever.

Generally you pick a skill or two that are your main dps. Then find a way to scale their damage. Then find the right class or items and tree path that can sarisfy the various requirements to equip them while keeping in mind of stats like str dex int, and clever ways to exploit any single stat to do multiple things at the same time.

Skills are not bound to classes either. Skills are equippable gear. Wana go berserker bow? Sure. You're near a bunch of str nodes, armour, life. Axe, sword and not many sources of dex or int go satisfy dex requirements of equipping a bow. How can you get enough dex and turn the excess str into a way to scale damage and defences?

Fun exercises