The situation still doesn't look good for Patchouli...(Notice the size of the syringe Flandre's carrying)
Why didn't Reimu recruit Remilia, though? She hasn't gone through the miko process yet, after all. And if Flandre could do it, I don't see why Remilia couldn't.
@BlueFox: Maybe Reimu only tied them up so they wouldn't get in the way of her ministrations? With Sakuya back up and about, she can probably keep Flandre from going overboard.