PS there is a system to go for TRI, go for TET, etc. Yeah it's a grind, but the reason people get frustrated is by focusing on getting TRI or TET or whatever on a single item, this is the wrong way to do it. I know this counters the common thought process of "ill just get my weapon TRI/TET/whatever" because everyone is obsessed with AP and you get the biggest gains there, but that's a bad way to do it.
So you can get up to about 20-25 FS cheaply. You can get all your gear to DUO without much fuss since nothing delevels.
At that point, at Full DUO you are at "TRI or CRY". And you have 25 failstacks.
You start by attempting TRI on your armor then your weapons, in the order of "least want to get > most wanted" So typically the last DUO item you attempt to TRI will be either Kzarka or Dande depending on which one you have.
So say you do this:
Helm at 25 stacks, fails, now 29 stacks
Gloves at 29, fails, now 33 fs
Boots at 33, fails, now 37 fs
Chest at 37, success. now 0 FS
Now you go back to getting your Helm, Gloves, and boots back to DUO with cheaper FS. Then get your cheap 25 FS, Once at 25 you start again. skip over the chest you already got to TRI.
Yellow weapons typically pop around 44-50 or so. That's Kzarkas, dande, nouver/kutum. You have to fail a few TRIs to get to those FS. IF you start trying to TRI just your weapon, you're starting way too early and will have to fail a lot of times to get the needed failstacks, meaning you will need to re-DUO your weapon a bunch of times, and it will get frustrating.
You repeat the above process until you are at full TRI. You can stop here, sure, but if you keep playing the game you are going to keep accruing silver, blackstones, shards, etc. so eventually you will start over at "TET ROULETTE"
Build your 25 FS, and you start sacrificing your TRI gear. Again starting at least important piece > most important.
At this stage every failure is 5 FS, but you need much higher FS to get TET to pop. Don't get upset if nothing pops for you and all your gear is at DUO. You just repeat TRI OR CRY stage above on different character, saving your TET stacks for the next round of TET ROULETTE.
Eventually, you will be at full TET.