I think I was blessed by the Random Number Gods for this run.
Shortly after clearing Hell's Arena, I stumbled upon a super shotgun and a red armour. I promptly discarded the double and continued on my merry way, collecting up to seven blue armours at one point. On the way to Deimos I started progress on a fireshield. Cleared the Anomaly with little trouble, and then I tried my luck again at Deimos Lab. Prior attempts have all ended badly. By this point I had two envirosuits in my inventory. There I found another super shotgun, and the resources to make two thirds of a fireshield, and after killing both shamblers, half of a fireproof armour. I also learned how to make a speedloader pistol. I also found a unique mod, but I don't think the firestorm mod helps shotguns much.
Next floor gave me the rest of the fireproof armour supplies, and I had attained Fireangel before spanking the cyberdemon. A few floors later, I assembled another fireproof armour because I could (when is this ever a valid justification). Along the way I also picked up a gothic armour and had a supply of pristine blue armours.
And then, Dis...
I had reached the Spider Mastermind a few times in 0.9.9.6, all of which ended with me reduced to a red smear. I have reached Dis twice now in 0.9.9.7.
0.9.9.7 HNTR Spider Mastermind is a pansy.
With my shotguns, I was hoping to build a nano-shrapnel super shotgun and/or a plasmatic shrapnel super shotty. I never found any advanced mods other than the firestorm weapons pack. I also never found the Jackhammer :<.
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DoomRL (0.9.9.7) roguelike post-mortem character dump
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Pancor, level 10 Former Human Lance Corporal Technician,
defeated the Mastermind at the City of Dis.
He survived 100712 turns and scored 93431 points.
He played for 1 hour, 54 minutes and 37 seconds.
He didn't like it too rough.
He killed 544 out of 544 hellspawn. (100%)
This ass-kicking marine killed all of them!
He was an Angel of Shotgunnery!
-- Special levels --------------------------------------------
Levels generated : 11
Levels visited : 4
Levels completed : 4
-- Awards ----------------------------------------------------
Medal of Prejudice
UAC Star (bronze cluster)
Hell Armorer Badge
Hell Champion Medal
Veteran Bronze Badge
-- Graveyard -------------------------------------------------
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-- Statistics ------------------------------------------------
Health 52/70 Experience 46704/10
ToHit Ranged +0 ToHit Melee +0 ToDmg Ranged +0 ToDmg Melee +0
-- Traits ----------------------------------------------------
Class : Technician
Ironman (Level 2)
Hellrunner (Level 2)
Reloader (Level 2)
Dodgemaster (Level 1)
Whizkid (Level 1)
Shottyman (Level 1)
Fireangel (Level 1)
Rel->Rel->SM->HR->HR->WK->DM->MFa->Iro->Iro->
-- Equipment -------------------------------------------------
[a] [ Armor ] blue armor [2/2] (114%) (B)
[b] [ Weapon ] super shotgun (10d4)x2 [0/2] (P2)
[c] [ Boots ] plasteel boots [2/2] (100%) (T)
[d] [ Prepared ] shell box (x100)
-- Inventory -------------------------------------------------
[a] super shotgun (9d4)x2 [2/2] (P1)
[b] blue armor [2/2] (100%)
[c] blue armor [2/2] (100%)
[d] fireproof red armor [4/4] (100%)
[e] red armor [4/4] (200%) (BT)
[f] fireproof red armor [4/4] (100%)
[g] gothic armor [6/6] (200%)
[h] shotgun shell (x50)
[i] shotgun shell (x50)
[j] shotgun shell (x24)
[k] shotgun shell (x50)
[l] shotgun shell (x50)
[m] shotgun shell (x50)
[n] shotgun shell (x50)
[o] large med-pack
[p] large med-pack
[q] large med-pack
[r] large med-pack
[s] large med-pack
[t] shell box (x100)
-- Resistances -----------------------------------------------
Acid - internal 0% torso 0% feet 50%
Fire - internal 0% torso 0% feet 25%
Plasma - internal 0% torso 20% feet 0%
-- Kills -----------------------------------------------------
100 former humans
67 former sergeants
31 former captains
88 imps
56 demons
125 lost souls
14 cacodemons
17 hell knights
12 barons of hell
7 arachnotrons
3 former commandos
5 pain elementals
3 revenants
2 mancubi
8 arch-viles
2 bruiser brothers
2 shamblers
1 Cyberdemon
1 Spider Mastermind
-- History ---------------------------------------------------
He started his journey on the surface of Phobos.
On level 2 he entered Hell's Arena.
He left the Arena as a champion!
On level 7 he sneaked into the Phobos Lab.
He broke through the lab.
On level 8 he encountered the Phobos Anomaly.
On level 9 he entered Deimos Lab.
He destroyed the evil within and reaped the rewards!
On level 10 he assembled a fireproof armor!
On level 14 he ventured into the Halls of Carnage.
On level 16 he found the Tower of Babel!
On level 18 he assembled a fireproof armor!
Then at last he found Dis!
On level 24 he finally defeated the Mastermind.
-- Messages --------------------------------------------------
You are hit! You are hit! You are hit! You are hit! You are hit! You are hit!
The Spider Mastermind hits you.
Fire -- Choose target...
You see : a Spider Mastermind (mortally wounded) | blood | [ m ]ore
Targeting canceled.
You use a large med-pack. You feel fully healed.
Fire -- Choose target...
You see : a Spider Mastermind (mortally wounded) | blood | [ m ]ore
The Spider Mastermind flinched!
The Spider Mastermind hits you. You dodge! You dodge! You dodge! You dodge!
You dodge! You are hit!
Fire -- Choose target...
You see : a Spider Mastermind (almost dead) | blood | [ m ]ore
The Spider Mastermind dies. Congratulations! You defeated the Spider
Mastermind! Press <Enter>...
You feel relatively safe now.
-- General ---------------------------------------------------
9 brave souls have ventured into Phobos:
7 of those were killed.
2 souls destroyed the Mastermind...
2 killed the bitch and survived.
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Two classes down, one to go. Maybe I'll deviate from AoSh... Or maybe post a mortem from less successful runs...