I've got two questions. Firstly why do monsters even need a carry limit? Unless players can control them or you can get pets to carry your stuff I'm unsure what functionality it would fulfil. I wasn't aware that a monster could pick anything up nor have I seen a scenario where that's intended or possible. Only thing I can guess is that it could be useful for something like a druid that can transform into another creature

Second point I'll just make is that carrying capacity is actually a fairly major stat for players so that for example on my mage char I have a lot of str+ gear as I think players start getting speed penalties when they reach about 2/3 of their max carry limit and that 2/3 also includes all equipment used, keys/one-drop items and any potions/food needed. If dwarves had 30% more carry capacity than humans then no one in their right mind should go as a human. Admittedly I'm assuming by greater racial diversity you probably intended to include other things like maybe spell damage, hp, mana, grace, regens etc but I thought I'd just mention it

I think I understand and it's broadly what I imagined. First point does give potential for new features and second point could well have quite a bit of overlap with guilds work being done by clobber

One thing I should mention is that when you cast probe on a mob it gives it's weight. For example a ghastly soldier in Mysterious Vault weighs 87kg, while animated priestess weighs 75kg and a zombie weighs a mere 27.5kg. I'm unsure if that's related to what you wanted or not although if my memory serves me correctly I think beholders may well weigh 950kg so it's not perfect but it's something similar somewhere in arch files

I don't think probe takes loot into account.

As far as carrying capacities go I think it's simplest to at least initially break it down into general classes and the adding a modifier for slightly special ones. I would probably split it as something like this:

Undead - low
Human - Average
Giant/Cyclops - High
Golems - High
Animals - low
Elf/Drow - slightly below average
Insects - low to average
demihumans - low to average
Slimes - very low
Demons - average to high

I'd probably add that child versions should probably have carry weight halved while mutiarch mobs should probably carry more

Values are just guesses so can be changed as you see fit. I'm unsure what figures should be numerically speaking as it depends on how they are going to be used as if mobs use equipment like players that could change things. Another thing that could be taken into account is that if idea is that for example a player can use one as a pet then logically you could have a pure support pet who just carries loot or you could have one that is highly combat spe****ed but useless for carrying.

As ball park figures I'd say anything over 200kg is probably too high and anything below 25-30kg is probably on low side. Maybe 140kg for high, 100kg for average, 60kg for low and 45kg for very low could work? However caveat is it depends how they're intended to be used so it's a bit of a blind guess but if you want provisional figures it should work

@Shroud: Yup, I agree with all that.

@Misidian: For me, coding is needed (some fairly broken or inconsistent code exists so at a minimum I'm having to fix it, at a maximum write new) -- should be reasonably done by the weekend and it might even work! (In my head it is flawless.) For everyone else, just add the attributes to the .arcs (or better ATM add to the discussion here so have a precise plan and can then do it all at once).