To The Dragonslayer - it would be cool addition if it could crush walls by attacking them, it would increase the feeling of unstopable DooM.)
Imho there should be one special level that grants red armor as one of the rewards. Now the first level with guaranteed red armor is only The Mortuary(The Vaults generate rewards randomly). HoC seems to be good for it, replace one of the supercharges with red armor(for example, right one, anyway it's a waste now), and everything will be fine.
About The Vaults - there's a little error(at least it looks like error) in the map.
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##∙∙∙########∙∙========∙∙##############∙∙========∙∙########∙∙∙##
##∙∙∙## ##∙∙##==##∙∙## ##∙∙##==##∙∙## ##∙∙∙##
##∙∙∙## ##∙∙####∙∙## ##∙∙####∙∙## ##∙∙∙##
##∙∙∙## ##∙∙##∙∙## ##∙∙##∙∙## ##∙∙∙##
##∙∙∙## ##∙∙∙∙## ##∙∙∙∙## ##∙∙∙##
##∙∙∙## ##∙∙## ##∙∙## ##∙∙∙##
#@>∙∙# #∙∙# #∙∙# #∙∙∙∙#
#∙∙∙∙# #∙∙# #∙∙# #∙∙∙∙#
##∙∙∙## ##∙∙## ##∙∙## ##∙∙∙##
##∙∙∙## ##∙∙∙∙## ##∙∙∙∙## ##∙∙∙##
##∙∙∙## ##∙∙##∙∙## ##∙∙##∙∙## ##∙∙∙##
##∙∙∙## ##∙∙####∙∙## ##∙∙####∙∙## ##∙∙∙##
##∙∙∙## ##∙∙######∙∙## ##∙∙##==##∙∙## ##∙∙∙##
##∙∙∙########∙∙========∙∙##############∙∙========∙∙########∙∙∙##
##∙∙∙∙∙∙∙∙∙∙∙==========∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙==========∙∙∙∙∙∙∙∙∙∙∙##
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Lower left triangle column looks not like other columns, and that difference do not serves any purpose. It just attracts people attention because they think that if it's different, then it means something.
And, at last, about ranks. Perhaps skill ranks are all right, so we won't touch them. But requirements for experience ranks are just crazy.
Here is my player.dat, i have it since 0985(IIRC), and since then i haven't started a new one.
--------------------------- DoomRL Player Info ------------------------------
former human 6057
Skill rank : General former sergeant 5351
Experience rank : Hell Knight former captain 3087
Games won : 33 Partial wins : 2 imp 2742
All kills : 37064 Standard wins : 26 demon 6609
Melee kills : 2541 Full wins : 5 lost soul 2784
cacodemon 2200
To achieve Overlord rank: baron of hell 2012
-- complete the Angel of Impatience on Nightmare! Cyberdemon 24
-- complete the Angel of Light Travel on Nightmare! hell knight 1472
arachnotron 1897
John Carmack 2
To achieve Hell Baron rank: former commando 717
-- kill 800 barons of hell Angel of Death 4
-- kill 5000 enemies in melee pain elemental 643
-- kill 100000 enemies arch-vile 777
mancubus 552
Difficulty level achievements Deathsrevenants 128
I'm too young to die! : won (2 win total) 5 1006
Hey, Not Too Rough : fully won (3 win total)8 521
Hurt Me Plenty : fully won (2 win total)14 1913
Ultra-Violence : fully won (23 win total240 21427
Nightmare! : won (3 win total) 77 12197
------------------------------------------------[ Space,Enter, Left/Right ]--
I don't think that many people have played more than me. And even for me this requirements are crazy. They means that i need to play three times as much as i have already played since 0985. And i'm sure that i won't do that just to achieve that rank.) And mancubus rank too annoyed me a lot because mancubi have a little spawning rate, so getting only 15 mancubus kills in one UV run is too long for requirement of 500. And also i haven't even read Hell Knight's rank requirements, i achieved it right after achieving mancubus rank, so perhaps they should be swapped.