Once again, you twisted my words. I never said that I thought requiring resources made a card bad, I only said that your logic was poor. But, now you are trying to tell me that I said that requiring resources does make a card bad.
I run a Gemini Deck with it and it's pretty handy. If you say, fusion summon Superalloy with Phoenix Gearfried and Gemini Soldier, and then summon Blazewing butterfly, you can then use the effect and then tribute summon Phoenix Gearfried.
Having a couple Double Summons and Gemini Boosters is just gravy on the deck.
Is this card can't fusion summoned with a fusion subtitute?
Fusion substitutes can only sub for monsters specifically named in the fusion monster, like Red-Eyes Black Dragon or Meteor Dragon for Meteor Black Dragon. Since this card doesn't specify a name you can't use a substitute.
even this card attack considerably low but it have nice effect.