I suck at speedrunning but tried this technique successfully with ITYTD for a 12 minute run. Then took several tries to even get started with HNTR. One problem is I keep missing the chained court like a dumbass... but this time managed to win it anyway. :) I did not find any invulnerability. Killed Bruiser Brothers with shotgun, Cyberdemon and AoD with a knife, then it was a piece of cake to finish.
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DoomRL (v.0.9.9.5) roguelike post-mortem character dump
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Ilya Bely, level 6 Cacodemon Captain Scout,
defeated the Mastermind on level 8 of Hell.
He survived 15839 turns and scored 53816 points.
He played for 18 minutes and 25 seconds.
He didn't like it too rough.
He killed 119 out of 360 hellspawn. (33%)
-- Special levels --------------------------------------------
Levels generated : 11
Levels visited : 2
Levels completed : 1
-- Awards ----------------------------------------------------
Major Icarus Cross
Compet-n Gold Cross
Untouchable Badge
Speedrunner Silver Badge
-- Graveyard -------------------------------------------------
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-- Statistics ------------------------------------------------
Health 36/50 Experience 15664/6
ToHit Ranged +0 ToHit Melee +4 ToDmg Ranged +0 ToDmg Melee +6
-- Traits ----------------------------------------------------
Class : Scout
Hellrunner (Level 1)
Reloader (Level 2)
Brute (Level 2)
Berserker (Level 1)
Bru->Bru->Ber->HR->Rel->Rel->
-- Equipment -------------------------------------------------
[a] [ Armor ] red armor [4/4] (84%)
[b] [ Weapon ] Longinus Spear (8d8)
[c] [ Boots ] plasteel boots [2/2] (100%)
[d] [ Prepared ] double shotgun (9d3)x2 [2/2]
-- Inventory -------------------------------------------------
[a] shotgun (8d3) [0/1]
[b] shotgun (8d3) [1/1]
[c] shotgun (8d3) [1/1]
[d] shotgun (8d3) [1/1]
[e] shotgun (8d3) [1/1]
[f] green armor [1/1] (100%)
[g] green armor [1/1] (100%)
[h] blue armor [2/2] (100%)
[i] red armor [2/4] (26%)
[j] red armor [4/4] (58%)
[k] combat knife (2d5)
[l] shotgun shell (x47)
[m] small med-pack
[n] large med-pack
[o] large med-pack
[p] large med-pack
[q] Hellwave Pack
[r] steel boots [1/1] (90%)
[s] shell box (x100)
-- Resistances -----------------------------------------------
Bullet - internal 0% torso 60% feet 60%
Melee - internal 0% torso 60% feet 60%
Shrapnel - internal 0% torso 60% feet 60%
Acid - internal 0% torso 60% feet 95%
Fire - internal 0% torso 85% feet 85%
Plasma - internal 0% torso 60% feet 60%
-- Kills -----------------------------------------------------
11 former humans
10 former sergeants
4 former captains
13 imps
21 demons
38 lost souls
3 cacodemons
4 hell knights
5 arachnotrons
2 former commandos
1 pain elemental
1 mancubus
1 arch-vile
2 bruiser brothers
1 Angel of Death
1 Cyberdemon
1 Spider Mastermind
-- History ---------------------------------------------------
He started his journey on the surface of Phobos.
On level 8 he encountered the Phobos Anomaly.
On level 16 he found the Tower of Babel!
On level 17 he found the Hellwave Pack!
On level 17 he invaded the Unholy Cathedral!
On level 17 he found the Longinus Spear!
He then destroyed the Unholy Cathedral!
On level 18 he entered the Vaults.
He came, he saw, but he left.
He left level 19 as soon as possible.
Then at last he found Dis!
On level 24 he finally defeated the Mastermind.
-- Messages --------------------------------------------------
You need to taste blood!
You need to taste blood!
You need to taste blood!
You need to taste blood!
You use a small med-pack. You feel healed. You need to taste blood!
You need to taste blood!
The Spider Mastermind hits you. You need to taste blood!
You hit the Spider Mastermind. The Spider Mastermind hits you. You need to
taste blood!
You hit the Spider Mastermind. The Spider Mastermind hits you. You need to
taste blood!
You hit the Spider Mastermind. The Spider Mastermind hits you. You need to
taste blood!
You hit the Spider Mastermind. The Spider Mastermind dies. You feel
relatively safe now. Congratulations! You defeated the Spider
Mastermind! Press <Enter>...
-- General ---------------------------------------------------
111 brave souls have ventured into Phobos:
85 of those were killed.
1 didn't read the thermonuclear bomb manual.
And 6 couldn't handle the stress and committed a stupid suicide.
19 souls destroyed the Mastermind...
3 sacrificed itself for the good of mankind.
15 killed the bitch and survived.
1 showed that it can outsmart hell itself.
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