Delphina has asked this as the question in one of the weekly raffles.

Which two STG games would you combine and why? (Battle Dragons included)

I'd do AL and PL. AL for the good graphics and I'm used to it, and PL for crafting, Ichor quest, and some other stuff that would make a great addition to AL (Fluff had posted this in suggestions about some playground where we have to kill a "beast", and he said he got the idea from PL)