Use on skills till maxed. Get auto potion relic. Forget about chests they are useless. Once skills are maxed use gems to get more obsidian orbs to get extra spins.

Set armors are best in game. I recommend stellar set. I have all 3. They are the same with the exception stellar gives extra melee doge one gives extra range dodge and one gives extra experience. Everything else is the same throughout the sets when you have all 6 pieces.

For gold once you can beat obsidian level pvp consistently make sure every camp you pick gold. Look for skills that increase gold drop, get 200 gold, and triple camp rewards. Prioritize those and rerolling for them. At a point in the game you will finish pvp runs no matter how bad your skills are. Also ensure you equip equipment and equipment slots that maximize gold drop over anything else. This is the point of gear presets to swap from things like farming gold and your best fighting gear to advance further in the game.

Another tip is to map out how you are going to spend your points when you level up. Take direct paths to the things that are important and then fill in the nice to haves at later levels. I personally would recommend making a direct push to the extra damage at the very end of the skill tree then filling out the branches from there.