Yeah, its two of the best cross class skills MNK can pick up next to stuffing Impulse into your rotation.
MRD is kinda like a red headed stepchild. Really wish they left Archer as 3rd subclass, but that'd make MNK way too op with raging strikes and straight shot. Or was that only for DRG with pug and archer for subs prior to release and change to mrd?
IDR but anyhow, on topic, MNK has some solid cross class abilities to choose from.