Can’t tell if ur moleman is r4 or not but he is by far my mvp through all act 7 exploration. He has so much utility and different forms of damage that there is a beneficial node for everything he does
I have a 6* r3 kingpin and a maxed 5*. Never used him more than once in all act 7 exploration. I would recommend crossbones or deadly origin. There are a lot of nodes that benefit skill and villains so mole man and crossbones work for that
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however since he is unawakened I could see crossbones also being a super solid option