Doing the R30 leves(solo) in LL at 5-star (hardest mobs mostly R42~) as R34 yields around 3k with no Aspect (4.2 - 4.9k, i didn't get speed bonus every time, almost did though, & difficulty bonus).
Behest is recommended R35, highest i got was 4.9K in Cassiopeia Hollow solo. It was insanely easy too.
Bloodshore(R20) leves no longer give much SP, only 700-900~(down from 2K~) now, but the R30's give alot more.

Starting from only a few 100 into R34, i was able to get around 40k~SP (53K for total level) for all 8 leves this reset.

Amal'jaa at Broken Water is good grinding too if you are in the mood for it (around 300-350~ in a group of 4-5, kills are fast). This is the fastest place i've leveled on MRD so far (spent only a few hrs to go from R32-34), i have yet to try the raptors in LL (Passing by, there are tons of them though).
I'm trying not to grind much since we'll have EXP chains & chests very soon.

I keep hearing that Gridania leves are the best (7K from one of the R40 ones), but i'd like to try them out soon.