When you do a Fel spawn successfully you're guaranteed some amount of scrolls. It's like a warm security blanket. Doing Trammel stuff is more-random. Only thing random about Fel spawns, assuming one can complete them, is what you'll get, not whether or not you'll get anything.Why fight for a 120 magery scroll that's worth 20m when you can sit safely in tram and solo medusa non stop for a slither that sells for 5-6 times that amount..make sense?
Fel spawns were much more active when it sold for more..now that you can get almost any 120 scroll for under 5m there is almost no reason to farm them..unless of course your hoping for the epic drop of a 1.0 taming pink or 120 mage
The people I know with the steadiest and most reliable incomes are either crafters, merchants (meaning they play the buy/sell game), or champ spawners.
-Galen's player