If I trade my ingredients for an item at the Cannith challenge traders (eg: Calomel Longbow), upgrade it to tier 3, then upgrade it to the next level, do I have to repurchace the tier upgrades, or do they stick?
1. Purchase a level 16 Calomel Longbow
2. Upgrade it to Tier 3
3. Upgrade it to level 20
Does the now level 20 bow end up as a tier 1 or a tier 3?