/BLM gives almost nothing that is useful on NMs, my BLM is 65 and rising, plan on getting it to 90 and getting Maats cap.

/BLM
Sleepga
Stun
Warp II
ES
Ele Enfeebles
/DRK
Stun
Abs-line (mostly for procing)
Abs-TP (building TP during initial phase of combat)
SoulEater (damage buff)
LastResort (Attack buff)

Between the two I prefer /DRK so I actually have a chance of building TP prior to the kill it order. Then SE LR CDC and keep going until its dead. /BLM is pretty much for sleepga and Warp II. Ele "enfeebles" are horrible, their so bad that the BLM's done even bother with them. ES ~might~ be useful, except nearly every HNM made in the past few years has flat % reduction in para potency, no matter how much MND you stack you'll never get a decent proc rate, if you can even land it. Blame SE on that one. Max potency Slow II is easy to land now adays, and Dia III always takes effect no matter what. So really, what exactly would I be using ES on, a Nuke once per 10 min.

RDM's just sub BLM for the reason they sub WHM, it's an old habit from 2004 when RDM's job was written in stone by everyone else and then handed to them.