Board Thread:Event Official Threads/@comment-26091666-20160430054725/@comment-26574811-20160509025529

Harukami Ai wrote: How so? An STF fleet can get AS/AS+ (depending on the formation) on the boss node with 5 double chevron Reppus, if that's what you mean by "costign dearly" on the boss node, added with AACI.

There's probably also as much people using CTF that can't pass it. It's RNG. If you use CTF, the distance from your base (starting point) to boss is 6, but if you use STF, it's 7.

While you can sortie an air wing to the boss node as long as one or more squadron has a combat radius of 7 or bigger, all other squadrons with insufficient combat radius will be punished of their combat efficiency.

And now here's the deal:

1. you don't have enough land attackers to fill all the squadrons, so you will need to sortie Ryuusei Kais and Suiseis.

2. Ryuusei or Kai has a combat radius of 6, while Suisei series have 5.

So sortie with STF means having to be punished of your land-based air wing efficiency, while CTF don't necessarily have the problem.