Hey! Indeed Oshannus is really on the run now, almost always in my water battles.
But to the point, I think your approach is really effective to maximize output from both playing and renting. I am trying to do the same but my strategy is slightly different, gonna describe it soon.
I am not so deep with the earth but Oaken seems to be really heavy canon so thanks for the overview , I need consider to put it into my investment queue :) cheers!
He's a beast of a card. And the 12 mana is killer but I'll try to stick him into some matches and see how it goes :)