What equipment should I be upgrading?

[Cheese Wheel of Time]

Topic is title. Should I upgrade legendary gear and the set gear, or just not bother at all until max level?

[joxertm22]

Normally, you should upgrade only lv45 equipment of purple or red quality.
I've posted elsewhere that set items are a letdown, but if you do like them and use them in your builds, definetly do upgrade.

[roogun]

It really depends on the stat rolls of sub-50 Legendary gear and equipment. Usually, I would only upgrade equipment at max level, but depending on the rolls you got on equipment, maybe 1-3 upgrades are reasonable.
I found a legendary lvl 15 sword with terrific stat rolls which I used till lvl 40. Got nothing better till then. But in general max level gear will be better eventually

[LCG]

Generally Level 45 legendary and epic items should be your target for upgrading.

Some exceptions:

The Level 40 Draki-Set for Albus. Three piece bonus is absolutely worth for GS Albus and for hardest difficulties (Challenge/Cruel) outperforms any combination of Legendary/Epics in terms of overall performance.
Only makes sense for GS Albus though. Stop at three piece bonus. Full bonus is not worth from my experience.

Certain lower level Legendary and epic items with better combination of fixed stats.