Apparently I lied
saves of 60+ are possible for the build with a few sacrifices or minimal sacrifices if you have Half-Kyton.
Wraith Assassin: 30 AS / 7 WM / 3 RO The Devcrit Master
"Wraith" (secret subrace) - no race requirement (changes Appearance)
STR - 3, DEX +3, INT +1, +6 hide, +6 move silently, free feat: Aura of Courage, free feat: Immunity to Sleep, free feat: Perfect Health, Immunity: Death Magic
"Half-Fiend" (secret Beyond UltraRare subrace) - no race requirement (adds wings)
DEX +6, CON +4, INT +4, Wis -2, CHA -2, +6 hide, +6 move silently, sr 10 + 1/lvl, able to walk on quicksand
"Half-Kyton" (secret Beyond UltraRare subrace) - no race requirement
DEX +4, WIS +4, CON +4, free feat: Improved Spell Resistance 1, free feat: Improved Spell Resistance 2, free feat: Dodge, free feat: Mobility, +8 hide, +8 move silent, +10 tumble
You'll also need to base this on the Human template (for Wraith or Half-Fiend) or you won't get the feats quickly enough to have WM at level 13.
You need Wraith/Half-Fiend/Half-Kyton for this one to be able to access assassin at level 2 and then you take Rapier (or another 18-20 critical chance weapon) as your weapon of choice which gives you a final critical chance of 10-20 with a keen weapon.
Level progression
1 Rogue, 2-11 Assassin, 12 Rogue, 13-18 Weapon Master, 19 Rogue, 20 Weapon Master, 21-40 Assassin
Ability Points (Wraith)[ Half-Fiend]{Half-Kyton}
Str 8 (5) [8] {8}
Dex 17>20 [16>22] {16>20}
Con 14 [18] {18}
Int 13 (14) [17] {13}
Wis 8 [10>8] {8>12}
Cha 8 [8>6] {8}
I’ve done my best to give an idea of modifications for this build for Half-Fiend and Half-Kyton but I've not put them through the calculator so there may be some points hanging around at the end.
Feats in order
Dodge, Expertise
Mobility
Weapon Focus
Spring Attack
Whirlwind Attack
Weapon of Choice (Bonus WM feat) Rapier preferred due to improved critical range
Weapon Finesse – To get max ab
Improved critical - (for weapon of choice)
Epic Feats
Epic Prowess
Epic Weapon Focus rapier
Shield Proficiency
Armor Skin
Blind Fighting
Great Dex I-V (taken as assassin bonus feats)
Iron Will
Great Fortitude
LL Feats
Great Dex VI-X
LL Will
LL Fort
Saves @ 60 all for Wraith (others will add up to a couple of points to Fort and/or Will).
Fort 20 +20 (items) +5 (LL) +6 (ability bonus) +7 LL save = 58
Will 20 +20 (items) +5 (LL) +6 (ability bonus) +7 LL save = 58
Reflex 37 +20 (items) +5 (LL) +6 (ability bonus) +7 LL Dex increases = 75
You could always drop a couple of Great Dex and grab the epic saves to get 62, 62, 68 at the cost of 1ac and 1ab. Also possibly drop another couple to get epic focus in DT and Search to be able to find/open stuff in the Hells. Half-Kyton would also enable you to take Luck of Heroes at character creation and then LL Luck of Heroes to give +4 on all saves due to the two free WM feats it gives you, this combined with the +4 stat bonuses on Con and Wis would effectively give you 64, 64 & 70 saves. Both the BUR races effectively give you a couple of free feats whilst attaining the same final Dex making the build with these slightly less painful.
I’ve added this information as I’ve had a few folks ask me about this build recently and realised that losing cleave for much boosted saves was probably worth it, also gave more information on the feats I used.
Hmm, if I managed to get hold of Half-Kyton I might rebuild Ghostly as Dev Crit always makes me chuckle.