From my experience in dyna the weapons and af gear are based on TH and coins are more on red procs(assuming u have all TE, which u should). I'm sure coins are affected with TH as well, but not sure. Think I read where each color proc opened up another slot for coins to drop, but not completely sure. IMO, if you want just armor or weapon just kill fast as you can with TH and dont worry about proc'ing, just make sure you get the TE's 1st so you can have plenty of time and proc once you get what you want, good luck!
weapons/gear - more chance of dropping with no proc, TH helps
currency - more chance of dropping with proc, TH helps
-any proc opens up a slot for a possible drop
-blue!! - opens up a slot for additional
possible drop
-yellow!! - opens up a slot for additional
possible drop
-red!! - opens up a slot for additional
possible drop
-white!! - opens up a slot for
100% 100 drop
while getting TE obviously gives you more time, if you are only after your base weapon just go murder lots of quadavs and get TE if you need it
edit/tldr:
blue proc - ~0-2 coins
yellow proc - ~0-3 coins
red proc - ~0-4 coins