[little ninja]

/BLU is decent from 1-20, after that, it's utility wanes because the best cures won't come til 60+ under sub. Auto Regen and +CHR and be set by spells, but its a short-term subjob.

/RDM offers some passable survivability, but you get access to Blink and Stoneskin much later than /WHM and absolutely no status cures. Dispel at really high level is nice, but doesn't do much for BST.

/WHM gets you access to all the curing and status cures you will need. Raraise at 66+, Blink and Stoneskin within the 50s. High survivability and Auto Regen is a bonus. Best total-package solo subjob. /WHM gets everything it needs earlier than other subjobs.

/SCH - Gains access to -na spells at +20 with Light Arts + Addendum:White. Much like /BLU, however, the way cures are distributed make things rough. Access to cure II at 30 under sub and access to Cure III at 60. Lack of Reraise under sub hurts it a little, but access to an effective Aspir, Drain and Regen II down the road is a major plus

/DNC - like SCH and BLU, the cure curve here is slow, but when you get Snarl, its not a totally unreasonable subjob, its just that you want to funnel most of that TP into Rampage when you get it in the late 50s. Major con is a lack of status cures until 70+, but a positive is that it works great for zones loaded with magic aggro as DNC's cures are job abilities.

/NIN - lacks status cures, but can absorb single-target magic and physical hits. Also a good choice for places where you want to protect yourself from possible magic aggro. Additional boost to stats from Dual Wielding stat bonus axes is also nice. Tonko and Monomi spells offer superior duration to /WHM, /RDM and /SCH's Sneak and Invisible.

This is pretty much the list to go by. Though I would like to add that most of the time other subjobs, or subjobs on this list all have their place. The time to use most of them always seems situational. I have used /sam (tp spam), /brd (Accident that worked effective), /war (provoke to snarl), thf (item hunts, coffers ect) as well as those listed above. So most times you base your sub on what your doing, and where your going.

As for RDM I know a few who lvled Bst pretty high with it but eventually caved in and lvled Whm just for the teles mainly. Then again the same can be said for the nin subjob as well. An to this day I know a few 75 Bst with nin subs at lvl 20. As for the job itself I cant speak of how it faired from the 1-75 range since I used Whm or Nin. But I find it very useful at 75 when I am targeting certain mobs.