I think you are right on LB. I have swapped it for GS as swoop is just so good for both closing and escaping. I've just discovered how awesome healing spring is as well. Fighting in the regen combo field is fantastic. Plus swoop gives you an instant heal leaping in or out of it.
I will try S/H if you think it is better. I really like the stun on GS as well though. You can take down the NPCs so much faster by interrupting their heal. And that is important for a roamer taking down camps!
With berserker bows the crit chance is 41%. Could get it over 50% with food but I am running truffle steak and sharpening stone to get power over 2200.
I would try swapping out protect me for SoW, you need Dwayna runes to make it work though. After surviving so long with passive healing I can't get rid of it now. Its working a lot better than Protect Me for me. PM the pet just goes down too fast and you lose damage output.
Let me know what you think of LB/SB. I'm generally starting the fight with vulnerability or a knockback, then RF, then switch to SB. I then switch back if I need another knockback.