Ideal Cap Armor / Tip / Cap Combo?

I'm looking into picking up some cap armor to try out. What is your best setup for this as far to pair with the different tip options? Titanium armor? Stainless steel armor? Perforated cap?Should I try the Halo tip?

Best M7 Tip Combo - ?

Best Titanium Tip (Vong/Omni) Combo - ?

Best Halo Tip Combo - ?