IC post is up.
Achak is not expecting resistance, but is also aware it could be a trap. To translate his requests into crunch:
1) He's asking Sister Rebecca to provide counterspelling.
2) 8-bit, Run & Gun has some fun rules for flechette suppressive fire (p. 120, it's "virtually unavoidable"). Achak is so armored that he's not worried about being caught in the cone of fire.
3) Similarly, he's telling Sister Rebecca not to be shy about shooting sawdust grenades everywhere, should it come to that.
FYI, Achak's speech to the vampire (and then to Sister Rebecca) is stitched together from things Jesus said on Maundy Thursday and Good Friday, which is where we find ourselves in real life. There were other lines elsewhere in the Bible that would be appropriate, and might flow a little better, but I couldn't pass up the timeliness of what's happening concurrently in the Church calender.