to me the mob size is risk... want low risk, u hunt low risk mobs, eg low hp mobs
if u want high risk then hunt high hp mobs
For me, what makes me decide what mobs to hunt is the (historical) chance of loot some nice, useful items. Preferably repairable. And since 2007 or something like that, the nicest items have dropped from the biggest mobs.
If someone would give an indication it's possible nowdays to loot a 7a2 rifle from a (small) foul, or an imp fap from a Little molisk, I would go for it. Or, goes without saying, if it would be possible to loot an oldschool VIII chip (wormhole chip, firestorm chip) from small thorifoid shamans.
Markupwise, the sanest mob on Calypso to go for would probably be punies and collect the bones. Though then I'd collect them for myself first
. No idea what other mob to go for. Some week ago me and my disciple did a short run on small fouls, and we did not get any "foul specific" (bones or hides). Dunno if we just had bad luck or of the drops have been changed that way. And, well as you know, gazz drops have been nerfed from drones, and ever since that VU, I haven't gotten a single caldorite stone from thorifoid. (Honestly, I didn't collect the stones properly, but on the other hand, I remember those Days I could take the stones from the thorifoids and the stones from the drones and Craft one or two oreamps and hten take those low-TT oreamps to go do a mining run.
On Arkadia, the only mob I normally go for there are oratan lancers, those who know me know why.
On calypso often people ask if I want to join on proteron, and there are tons of Atrox events. I just answer; no, no please no.
I might go for Mulmun elites, but it's mostly because of their rarity. Let's say I see around four a year I have an opportunity to kill.
Eomons this yera was for blood samples (looted C, bought A and B from auction). Well now I know eomons are over for now, so I'm closing the hope to get samples for higher level amp (bought a level 1 amp from auction mainly to try the technology). Looting a repairable XI heal chip would had been nice but it seems like none of those dropped this "year". Also as far as I know no Tango (or Mod LR-53?). I looted an (L) rocketlauncher level 60:ish (which is far above my level).