Not really 
T-T
It's one of these bad times of the year
I thought he was going to stop sound from escaping the room 
For the record,I brought it up, since I was the one doing it. Thanks.
Note that the bit in the Mute flaw I was referring to in the following discussion would imply that actual sound is needed to "carry" your spells. Also, ain't your range influenced by low/booming speech?
Now, would PeIm affect this? I don't know. I can see a point being made either way, since magic can't enhance your voice range IIRC. I feel like this makes PeIm waaaaay too strong. Against an individual, it'd need to penetrate, but in a room? Makes head heart. Can't penetrate MR but will destroy species once they're outside of it??? 
Anyway, in doubt, she just needs to cast it right after Isen has cast his spell. He can do it with a very soft voice, after all. Hell, it's simple actually, even rules wise: If Isen has a better init, she casts it after him. Otherwise, she can hold her action to just after him.
He can't do it, IMO. Not without FFM.
Anyway, if it is good...
The magi can teleport back, while poor falko makes his way home. Now that they're together, Isen will spont a touch range, diameter duration, Intangible Tunnel to him, of level 05 (to carry spells up to level 20). He can spont it without fatigue. Once it is done, he'll cast The Silent Conspiracy, an mentally instruct Falko to go towards the wall opposite to the gate. Once there, if everything's allright, we can both spont a Part touch range lvl 10 PeHe spell to create a hole in the wall for him to go out, and cover this with a low-level "sight and touch" imaginem spell. That way, he won't have to risk the gates.