I agree, after playing a BH Juggernaut seems pretty weak. I've gotten the best results using soretsu form and Vette as a companion. Jump in, Slam, Sunder, Ravage if it's not on CD, force scream, then sunder / assault and vicious strike until everything is dead, and use Retaliation whenever it pops. Soloing not in Soretsu form was pretty painful for me; I'd die or be nearly dead after most pulls, even with stims. I'm guessing we'll get buffed at some point, hope this helps until then.