Rewarding solo necro camps

[Crawdad]

Guards, guards, more guards.

49-51 Grobb guards, always drop at least 12p worth of vendor trash.
51-54 Felwithe guards, always drops at least 20p worth of vendor trash.
(alternatively) 51-54 Wakening lands Faerie dragons and goos, dragons drop quest gems frequently (100p-1.5k) and goos drop trash worth 0-175p.
51-60 Brownie guards in Lfay, drop brownie parts (10p/per) and morning dew (20p/per) to sell in EC.
51-57 Kaladim guards, always drops ~15p worth of trash.

...I'm a big proponent of leveling off vendor trash mobs. Consistent Exp and plat will get you through leveling, then at 60 you can bother with specific item camps. Either that, or places you can Dot up a mob then alt+tab worry free.

I'm not too familiar with item camps for the low 50s anymore, aside from FBSS.