[HoE] Tapping and Doomies

["Lapdog" <silverfang@email.msn.com>]

New to the list so sorry if this has already been answered, but when a
Doomsayer "taps" the ghost storm for strain does he have to spend an action
tapping for EACH miracle he wants to cast (assuming that they all cost 2+ or
less)?
In other words, if he wanted to cast multiple MIRV's, would he tap...
cast... tap... cast...etc.
Or is it more like after the first tapping roll (if successful) he can just
continue to make the tapping rolls while connected to the ghost storm?