Go for act 4 and 5 exploration. For one, it will get you some great xp, and probably get you to 60, or at least a few levels. Also, you would get a few 5 stars from act 5, as well as, and arguably more valuable, 2 five star ag crystals and a generic. You have very little five stars, and I am surprised that you even have those two r4s. But unfortunately, act 6 would crush you, so focus on act 4 and 5 for now (and uncollected eq). Also, maybe try to take a shot a varient 2, it shouldn't be super duper hard because of your Thing, but it depends on how skilled you are.