Yeah looks like we are about at the same spot.
I never did find two max level megatheriums, so I settled for a couple of 120's with okayish stats. I'm hoping if I imprint, level up the babies, and have decent saddles I will still be able to beat gamma. I will know soon because I got super lucky with twins this time around and now have twenty! I still lots to do, but I am getting way closer. I really want a better saddle pattern. I'm farming the swamp cave and the western underwater cave religiously but haven't had any luck so far.
The only other exciting thing that happened today was all my dodos getting out of their pen. I have no idea how they escaped, but they were running all over the place and I had a heck of a time catching them all.