Help and Rate

Hmmm, looks like a nice and sturdy Spell Counter Chaos Deck.. Since that is what I see, I will offer opinions based on that.
One thing I recommend is: Dark Valkyria, it is a Gemini just like Crusader, and it combos quite well with it, so I personally would side deck it.
I also recommend either Siding Endymion the Master Magician, or main decking it in place of a Dark Magician.
As far as potential Synchros go, I suggest Arcanite Magician, Explosive Magician, or Temptest Magician as all gain good support via Spell Counters. And if it is a Spell Counter Deck, I say a good card to use is Spell Power Grasp.

And if you want just a "fun" combo to use:
run Slacker Magician, Downerd Magician, Rank - Up Magic Astral Force and Magi Magi Magician Gal. I don't really suggest it, but since this a Spellcaster deck, I felt the need to share it. It's a very hard combo to pull of, but it is fun, nothing more or less.

I don't if any of these help or not, but I just though I would give my two cents, I use to run Spell Counter Decks myself a few years ago.