Advice for Weapon (Or other gear)?

I’m at level 75 with a bit of a hybrid summoner/melee lifesteal type build. I’ve been having LOADS of fun with it, but I still have some “max level 55” stuff, including my weapon, that I got from Normal difficulty Ashes of Malmouth.

This may be a very stupid question, but is there a better weapon I can/should be looking for? The Heart of Theodin is amazing, but I can’t help but feel like I should have upgraded in 20 levels!