Re: Update: Not Scheduled Yet
Red Cave: Decent exp with a decent party, drops charms, "PB Items", Subs drop 45+ Items
Yimoogi: Decent exp with easier party, Drops 45+ Items, sub can drops charms, "PB Items"
If you want charms you must go red cave, if you want 45+ Items you'll need to go Yimoogis, Why should redcave drop everything just because they are harder.
Solo - Redcave can be 1-2 manned very slowly at lvl 43+ and quite pot intensive (even with a tao)
Yims - can be solo'd from 40+, good solo exp at 43+ easily, 1-2 manning in yims very cheap pot cost and good exp
Red cave - decent exp only if you have a strong party.
yims - decent exp with a weak party
surely you see the issue already here, exp per hour is just as good, if not better in yims, than it is in redcave. Even taking that stronger party that is required to make good redcave exp to yims, and the exp gains is still only slightly less in yims than in redcave, due to the amount of mobs that a bigger group can kill it can actually be better depending on the group comp.
Factor in the drops
Redcave, PB items and gems, due to the nature of gems you can end up coming out with worse kit. So if you do get lucky and can gem kit, you may be able to make some PB items have similar stats to lvl 45 items. Charms drop quite rare from normal and subs, and again the stat increase from charms, and the risk in using them, over a lvl 45+ item (drop form bag chance is higher than dropping from body) means they dont get used much in hunting caves to make any difference.
You have already said that weak devours are not subs - therefor you only have soul devourer, 1 on 2f and 1 in kr.
Yims - level 45/47 items from normal mobs, not seen any gems dropping but they may do. You have 1 sub on 1f/2f, and 3 subs on 3f/4f/kr (10+) that can be killed.
Subs in yims can drop 45/47 jewelry 46 armours, HA, 40/43 weps and charms, given you have 5x as many subs available in yims, without even having to go all the way to krs, again yims wins on that front too. Not sure if the same drop list is available in for soul devourers given none that have been killed have dropped anything other than PB items and gems/benes/charms.
So in reality, yims is the only cave worth hunting.
Please listen to the players, obviously core are happy with the current configuration given they have stacked wizards which excel in yims. Given we can craft gems, it makes sense to just hunt yims get items, once kitted sell these items for gold and craft/buy gems. Stay in yims until something better is available as currently redcave is pointless.