Just watched the first video. Nice work! :) I see you're making good use of radar-shooting. I find myself using that less than I used to; I'm too nervous about blowing up barrels that might destroy useful equipment or injure Formers who then waste med packs. It looks like you had no trouble getting a good supply of med packs, though.
I'm impressed that you went up against the Arena Master with a Chainsaw and no berserk! :o Clearly, I underestimate the benefit of Ballistic Armour! I should probably try to make it more often. :)
Basic armor assemblies is VERY useful than many people think.
I've underestimated them before trying Everyman Diamond, but when I'm trying it,
I realized that armor with decent resistance is extremely powerful for higher protection value itself.
Recommended assemblies for Everyman Diamond challenge could be:
Ballistic red armor +P - Protects you from being instakilled from melee damage and early zombies.
Fireproof red armor +P - Suffer 3 damage (avg) from Cyberdemon rocket, 3 from arch-vile, 1~2 from revenants/mancubi.
Quite amazing, isn't it? For Everyman Angelic, you'll definitely need fireproof red armor for Cyberdemon (if one can reach Tower of Babel) - as you cannot have dodgemaster trait.
Cerberus ballistic vest +P (
NOT +O) - For plasma/acid attacks, you'll definitely need them. It's almost impossible to clear Deimos Lab without it.
(actually, Cerberus gothic armor +P is the best (for duability), but it's rare)
Lava plasteel boots +A (If you get onyx pack from Deimos Lab, use it here), or Cerberus boots +A - For lava/acid pools.
I think Lava plasteel boots is enough (provided that you have onyx pack), as it can make you suffer only 1 damage from acid (and 0 damage from lava, of course)
so that you could save 2 power modpacks and 1 agility modpack.
Chainsaw +T (or Piercing chainsaw +T) : For unholy cathedral.