Wow, what a run! And 2 COMBAT PISTOLS ON AN AOMR RUN GEE
Gratz on your first YAAM!
I find that hell's arena is much easier then it used to be, but as compensation the chained court is no longer that "free heal + 10mm ammo" level. I dread to go there nowdays. Ugh.
As for the mortuary, let me put a recent amount of mortuary skips i've done:
-Onyx Red Armor, lots of Medipacks, Tactical Shotgun + P Double Shotgun, 2 hell skulls + hellwave pack, Gunrunner AoSh
-3 Red armors, lots of Medipacks, P double shotty + elephant gun, 3 hell skulls, Gunrunner AoSh
-2 red armors, Medium amount of medipacks, P Missile Launcher, elephant gun + tactical shotty, shockwave pack.
I'm scared crapless of that place. I remember entering once and dying nearly instantly, which was a LOT faster then I remember it to be. Unless i'm severely overestimating the difficulty of the Mortuary/Limbo or I just don't know how to approach it, I wouldn't go there again without the biggest fucking gun.