Your current weapon is gimping your damage a lot. Going from a 483 to a 502ilvl weapon, my dps increased 15-20k dps. Then going from 502 to a 530ilvl (upgraded 522) I gained nearly 20k dps again. IMO your main priority should be replacing that weapon of yours asap. I would save my coins to roll on a ToT boss that drops a weapon upgrade.