Uru is my go to form. 80% phys resist, most of the champs in the game are physical damage on basic hits. So you get to just hold block (take basically no block damage), bait heavies, and not have to worry about light intercepts. Plus if you go for a light intercepts and it fails you take peanuts hit damage. Also the damage in uru form is much more versatile than magma form (no champ is immune to phys bursts and a lot less champs have phys resist than energy resist). In side by side, same-playstyle testing uru and magma deal basically the same overall dps btw. Also in uru form you want to use your sp1, so you get to use up your morph charges more frequently and capitalize on the big vuln passives and regen more often, plus charge consumption also refreshes your state, taking even more pressure away from light intercepts. I even ran him with suicides + ibom in uru form. Spamming sp1s any chance I got them and consuming charges...and ended up balancing out at 70% hp in every fight. He massively benefits from suicides since all his secondary damage is mod attack based and he doesn't have any attack mod on his base.
"Critical Penetration refers to the amount of Armor and Physical and Energy Resistance ignored by critical hits, which for most Champions is 80%. Absorbing Man only ignores 60% of these defenses with his critical hits, but more than makes up for it with the extra burst damage those attacks deal" per Kabam
Bg should definitely go for the 6* Featured crystal this time around the way he hordes crystals he should save up for months for the Featured Crystal's he shouldn't really need basic 6* still I do wonder what champs bg is missing from the basic pool.
So really he chose to test Absorbing man than trying out Baron Zemo forget his appeal. He's bias not wanting to test both for a fair choice in making it reasonable