Enhancing is a very tedious task and you can get hammered by RNG where it goes from +19 to +9 several times. Don’t panic, this is just RNG.
Enhancements stones are used prior to reaching +20 on equipment.
|1-5||100% to level up.|
|6-9||Chance decreases, but level can only go up.|
|10-20||Chance decreases, levels can go up or down.|
|I – V||Chance greatly decreased, levels can go up or down.|
Enhancement crystals are found in Torment 3, boosted modes.
|I||Torment 3, boosted level 1-10|
|II||Torment 3, boosted level 11-20|
|III||Torment 3, boosted level 21-30|
|IV||Torment 3, boosted level 31-40|
|V||Torment 3, boosted level 41-50|