I ran Lava Caves 10 times, recalling when I didn't find a good teleport spot. Not once could I get both the Fire Giant and make quota in the time. It was either one or the other. 4 stars was worth it for first time bonus (~19k IIRC). Subsequent 4-star three runs were ~13k ea. I spent more time recalling/restarting due to bad placement. It's a quest I'll incorporate into my solo XP if I miss a night and need to catch up to my TR crew.
Extraplanar Palace: At level 18, I couldn't kill the dragon as a fire/lightning specced wizard before running out of SP/time. Could probably do it if I was acid.
Tomb of the Blighted was great for first time E/H/N bonuses with an arcane. Part of my TR crew hates doing Dreams of Insanity, so this might be the perfect replacement for it. Fast completion of Dreams really hinges on two good arcanes/divines to split up and zerg to the end. It's really painful with just melee.