Lava lurkers is undoubtly the best respawn to boost a rp due spectres take almost 0 damage from physical, not even with imbuements is enoughly good exp/hr compared to lava lurkers.
Now, there are some other options pretty good where paladin perform pretty well:
-asura palace (bring death protection + thunderstorm + burst arrow, rp can tank 1-2 mobs but avoid staying close to ek).
-wyrms (bring energy/death protection + ava + burst arrow)
-werehyaenas (bring death/earth protection + ava + burst arrow)
-western plains raid (really risky, earth protection + thunder + burst, ek must avoid get trapped otherwise rp could get a hs)
the idea is to keep fighting 5mobs the most time possible, less than that would reduce considerably the exp, more than that doesn't receive great part of the paladin damge (burst arrow) and rp have a great chance to be hs