I had thousands last DLC but rerolling solved that. This DLC I think I started in the 500's but that quickly dwindled. Exotics are 10 WP a level up=around 40-50 to complete a y2 exotic. And infusion is 10WP per go. Not saying its impossible to go positive. But you've either got to be lucky (I seem to get way more armor engrams than weapon), hardcore player (raids and hours of time), or just dont have anything you need.
Edit: Its 30 to fully upgrade Y2 exotic... Sorry was getting my year1's+2's mixed.
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Add that in the first weeks we were infusing (for me D:) like crazy "critter" because you wants better dmg in your exotic, i -blam!- it up with my Suros i infuse it like this: 280>282>288>288>291>297>297 (and not only with my Suros) then i learned that even if you infuse a 280 with a 285 you got a 284 for max, so now im trying to infuse with the max so i keep some weapons and the rest i dismantle but my rate of blue engrams are like this 1/10 (weapon/armor) and with that 10% i have like 25-30% to get one weapon for infuse and the other for dismantle and even with the dismantle my probability is like 33.3% for gettin 1/2/3 weapons parts, so getting weapons parts is very low, even if you keep or "infuse/upgrade intelligent" sometime in the future some of them will be like us or worst.