This is a solid list against JM5Ks. Loses to my Bomber list, but what doesn't?
The problem is that to be successfull you need a list that deals with both Scouts and Palp-Aces (like my Bombers), which is where I see this list struggle because of the TL restriction. Sure, Flechettes are great when you land them, but thats a really hard thing to do consistently, especially when there is still 1-2 other aces and a shuttle pounding you.
What exactly is your bomber list?