Getting DUO - TRI Help

Ok I finally decided to dump a bunch a resources into my new boss weapons in hopes to get TRI but it seems DUO is my brick wall I keep running into.

I have dumped 80-90 sharps into my kzarka, nouver and kutum trying for TRI and over 100 Hards, 600 armor stones building fail stacks. As we all know its nearly impossible to build stacks on green armor as you can get +15 with less then 20 stones many times so I tend to go to +8 to +10 then I have like 4 sets of grunil/heve PRIs i fail stack to +15 to +20 then I work on trying to get DUO on boss weapons. Thats my issue, all my weapons tend to keep giving +35 > +57 (57 is my highest thus far which I would now like to save to a TET pop).

I have built 3 45+ stacks one of them being the 57 which yes i know i may have went a bit too far but I wanted my mainhand TRI so bad haha.
I got like 4 green armors to TRI with random 12-18 stack. This is why I try for DUO at 18-25 cuz no matter how much I try its so hard to get 25+ stacks on this server from green gear. Retail Its not too bad to get 25-30 stacks from grunil or even reblah stacking.
I even used 70 cron stones once to try to get TRI with a 50ish stack with no luck .

This is almost the same as what drove me away from retail, DUO boss gear is just cancer.... Please, what am I doing wrong here? Is DUO just meant to be this hard? Is 18-25 stack too low for DUO boss tries? Is it just bad RNG day for me? This was my first big attempt at enhancing on this server, big for me = going for TRI.

In other words, How are you vets getting your DUO and TRIs? Or is that something you guys are going to keep secret? , Maybe i should just say F*$&$ it and just go full PEN green gear seen how easy green stuff is to enhance?

 

Duo max is up to about 31. Going higher is a complete waste of time. TRI is 30 - 45 again going higher is almost another waste of time as you're just using a higher tier stack ( TET ). People keep saying they've changed the enhancement rate though so who knows... On retail you don't go higher than those stacks you've mentioned.
Just save up and buy PEN weapons, much easier.