30-36: Blind Efts @ Mistbeard Cove (light party... or full party at lower levels)
They give about 300+ SP per kill and die fast. Sleep is important in this room. The spawn rate is a little erratic, ranging from insanely fast to having 1- or 2-minute pauses between bouts of pops. My LS thinks it has something to do with how fast you kill them, but we can't explain why you get a few fast pops, a short lull, a lot of fast pops, another lull, etc. During a lull, we hit the tunnels for some quick SP (puddings, eyes, and spiders).

Btw, I suggest reorganizing your list by breaking it into categories by group size (solo, duo/trio, light party, & full party), then sort by level.