1: Certainly. Soulbeast dps is solid in almost all fights in both raids and fractals. If you're doing fractal CMs though, firebrand works much better.
2: Somewhat. Firebrand is greatly preferred in fractals, while both firebrand and druid have their place in different raid comps.
3: That depends on your playstyle and how much you want to heal and dps. You need two sets of gear to run both a dps build and a healing build anyway, so my recommendation would be to put healing gear on your guardian and dps gear on your ranger since you said the dragonhunter dps was boring you.
