we cleared D7 last night, including the bonus boss, and wiped a couple times on bulwark due to the enrage timer.
make sure your positioning is correct... tank on one side, everyone else on the other
the droids don't need to die... don't waste time killing them... just toss a cc or agro them to keep them from repairing the shield
if a shield does go off, disable it immediately and continue killing the boss
to summarize, ignore the droids, unless you CC them, disable shields immediately, position correctly, and dps harder