BM is the best for solo.  It's up to u wheter u should go MM or SV for off spec.  I personally prefer SV as off spec in case I get in a lil trouble, I have improved traps and an increased 10% health.  If u go MM as off spec, then u will get the all mighty Aimed shot  (since u cant tell my tone thru a post, Im being sarcastic).  I personally don't like wasting 11 points to get a shot that takes twice as long to shoot than my other shots.  In the time that it takes to shoot 1 Aimed, i can get off 2 or usually 3 shots to do at the very least the same amount of dmg but very often I do more dmg (as BM without Aimed).  Another problem I dont like about MM is that with a high crit rate, you will pull aggro a lot more often from ur pet.  A good way to counter this is to get a good pet with as many learnable attacks (like claw, bite, etc) as possible along with an aoe attack.  This will give ur pet a lot more aggro to hold mobs.  The last piece of advice i can give is to learn a shot rotation that will give u high dmg output and also keep u from aggroing a mob until it is below 20% health.