I was soloing Odin on BST before the update (in less than 10 mins) but it was tough riding the timers. Now, at least if you mess up, you have time to put Twilight on and zombie it. I screwed it up yesterday and had to wait on timers.
Suggest to start with Call Beast outside (NQ Cricket is enough), then go in once it's available again. After 74% (that dam Geirrothr move), use Call Beast again, save Bestial Loyalty (Bertha) for the 3rd. Remember that Zantetsukan will go off at 9%, but it shouldn't matter if you use the cricket's Tegmina at 10%; it won't get the chance.
Tried doing Odin II after the update, got it down to 76%(ish), but because you have to be so close to the mob to do moves, I walked into a Sleepga. I was asleep for way too long as the pet died to Odin + adds. One of the adds did Mighty strikes, and I was simply unable to resummon pet and get adds off me in time. Forgot to put Twilight on .. but even with that it can be a tough solo. I'm sure it can be done, just a matter of good timing and keeping adds on the pet.