Honestly, I'm not too concerned about creating a smooth interface with UK's current pricing rules - which are liable to change again, anyway. And I like the cubic wealth formula for epic characters. We simply need to determine what we deem appropriate/desirable for characters of a certain level to possess.
It would be nice if we could maintain a continuity in item pricing, though, i.e:
Type I:
Ability bonus (enhancement)
Armor bonus (enhancement)
Save bonus (resistance)
Type II:
AC bonus (deflection)
Natural armor bonus (enhancement)
Save bonus (sacred, profane, insight or luck)
Weapon bonus (enhancement)
Type III:
AC bonus (sacred, profane, insight or luck)
The cost ratio in the
DMG is 2
5, and it would please me if we could maintain that. My only real concern is stat-boosting items which force higher spell DCs - I think that this could be problematic in conjunction with multiple Heightens from AMC. At the same time, I'm reluctant to cap them, and I don't want to price mental stat items differently than physical ones.
[I would suggest that we revisit the [augment] seed to see gain a clearer perspective, here].
I think bonus^3 x 200 : bonus^3 x 400 : bonus^3 x 500 might work - especially if we're looking at things in terms of 3 x 25% items, rather than 1 x 25% plus 3 x 10% items. Honestly, I think I'd prefer that anyway. I also think that they really
should be 25% items, though - not 27% or 29%. Individual DMs can award whatever treasure they like, of course, but I think we should stick tightly to the guidelines.
I'll whip up a 30th-level fighter (armor x 200; weapon x 400) just for kicks, to see how it looks.