what to keep?
first, you have to answer, do you play ssf, or trade heavily?
SSF, you'll keep alot of things, just for giggles, or self use if you feel like it. Alts, etc.
Trade heavily?, you'll want to trash all the garbage.
telling worth for trade. That is kindof supercomplicated with no solid answer. Experience. You can constantly look things up. Which isn't really reasonable for every single item you get..
But, over time you'll get a feel for what is A. RARE. B. has good rolls.
Like reddit had a talk on The Wind div card the other day(windripper from jungle valley). A guy was asking if it was easy to farm, as Humility for tabula. The answer is no. The wind is super rare. Probably more rare then just getting a Windripper directly.. no way of knowing that, other then experience though.
Uniques have rarities. Common ones, rare ones. Then, even a good unique might have a shit roll.
Facebreaker A facebreaker with less then 700% is garbage.
Belly of the Beast A 30% belly roll is well still a belly, but shit compared to a 40%.
So, knowing what the possible rolls on any given unique are, is needed as well.
Gems. SSF nerd, I keep tabs. 1 green, 1 red, 1 blue. 1 "quality+vaal"
This is fairly unusual. most traders do not pick them up at all. only grab Quaity gems, to do the 20% gcp recipe. vaal gems maybe? and drop only gems. Detonate mines, portal, added chaos, enhance, empower, enlighten.
Gems can be reset to level 1, or have -1 level from them. vendor the gem + scouring orb for -1 level. vendor the gem+regret orb, for reset to level 1.
Vendor recipe system
NOT leveling gems. Theres several reasons to do this.
one. stat requirements become too high.
two. mana requirements become too high. some skills, increase mana costs with little to no increase in value to you. like orb of storms+curse on hit. the orb is to curse, increasing its level only increases damage, which you dont care about. possibly. Or, more obviously Clarity, which increases mana reservation.
Three. Cast when damage taken.
Cast when Damage Taken Support CWDT has caps on the level of the skill it can cast, based on its level. and, at the same time, increasing ITS level, increases the amount of damage you take BEFORE it goes off. So, if you want CWDT to cast a level 20 immortal call, you need a level 20 CWDT. however, at the same time, you need to take 3272 DAMAGE, before it will cast. conversely, if you want to CWDT to go off FASTER, such a 725 damage, at level 4, you then need a level 4 immortal call as well.
Fourth, are you confusing the level 3 MAX level skill gems?
Empower Support Empower, enchance, and enlighten only level to 3. (can get higher with +level)
separate loot as in a loot filter on drops, or an addon to judge value?
Forum - Gameplay Help and Discussion - [Loot Filter] One Filter to Rule Them All v3.0.0 (Updated 2017-08-04) - Path of Exile