Board Thread:Questions and Answers/@comment-28846808-20160721232940/@comment-27095444-20160722174536

Not exactly, it's pretty simple strategy:

"Just stall until there are 10 Ms. Signs, then get to the castle, make the Ms. Signs safe, then unleash Bahamut. This strategy will take a  long  time (above one whole hour), so bring along a speed-up powerup. If you have  Warlock and Pierre  or  Takeda Shingen, this strategy will be even more easier, as you are sure that they won't hit the Ms. Sign by mistake"

Source - Deathhawk page.

Basically, when 10 ms. signs spaws no other enemies will be able to spawn (Not even the boss). When that happens, just spamm Crazed Giraffe Cat. Thus you will destroy their base quickly.