Originally Posted by
axemtitanium
Ah, there's the problem: you're counting your queue time. The queue time is the same for both Castrum and Praetorium when you're doing MSQ Roulette so there's no point in counting it for both when comparing the two. When you queue for MSQ Roulette, you're committing to whatever queue time you get (unless you withdraw). When comparing the instance timers, Praetorium is only slightly longer, but gives almost 2x the experience (2.6M for Praetorium, 1.4M for Castrum on WHM54, not in need).
It's not that I don't feel the experience is worth the time spent. It's that there's a 50% chance that my experience per time spent is way lower for no reason when I get Castrum instead of Praetorium, through no fault of my own.