What they need to do is fix their typo...
I am pretty sure they are really called "Three of Cons" behind our backs.
Just another way for the asses in "Nine" to separate us from our strange coins...
I have nearly had nearly every yr1 and yr2 exotic at one time or another in the game, so I don't bother buying the exotics that Xur sells. Instead, I buy only 3oC with my Strange Coins. I get anywhere from 45 to 60 3oC a week. I'll use 10 or more a night when I'm on. Honestly, I've been blessed with an exotic(sometimes two!) nearly every night. Truth, half of the time it's a helmet engram and MOST of them turn into the Skullfort :-/, but I did get a 310 Bad Juju two days ago and I've been rocking that puppy in PvE.
The things I do(if you want to try):
1. Alternate between PvE and PvP several times throughout your session. Do a few PvP matches, then go finish a few bounties in PvP, then switch back and do a few PvP matches, etc.
2. Only use one 3oC at a time. I made the mistake of using 14 at once a few days ago(by accident, was trying to level up an armor piece and didn't realize I was using 3oC instead of motes, lol) and received NOTHING from the next elite I killed.
3. Use ONE 3oC before every PvP match. I've received 3(?) exotics alone from PvP by this method.
And I've only been back from a 4 month "hiatus" from Destiny for about two weeks(?), maybe three.
All I can say is to try this method and see if it works for you, because it's been working for me.
Good luck. :-)
This would be kind of nice to see. Would also like to see them drop weapons and armor equally. Currently, armor drops about five or six times as often as weapons. Also, a cooldown timer would be nice so we don't needlessly waste our ToCs.