Bonebolt against FSS is extremely iffy, even with the Dragontal. I just can't seem to get enough
to OTK with Dragons before they can get enough
to where they SHOULD be able to kill with Bolts. I've only played two duels, but I can say that during this second duel, if the AI hadn't wasted its Fire Bolts early on I would have been completely screwed. Arsenic seems to be the win condition and I can guarantee they'll pack at least 2, if not 3 Deflags against us so it's even chancier. Early Sanctuaries are probably the biggest problem though; Poison Damage can't take effect almost at all with them on the field. Also, Reflective Shield = gg
EDIT: 1-4 against it now.
Other than this big problem, Bonebolt stands a good chance against the rest of their decks.