Part 4:
Farewell Gift: Unlock second Special slot and fill it with a +1 Lvl (if already unlocked, replace a Special slot stat with +1 Lvl)
Final Descend: Increase tier of one Atk., Health or Def. by one in selected Collection
Mass Crowning: Increase tier of one F.Atk., F.Health or F.Def. by one in selected Collection
Lament of Life: Increase tier of one Erosion, F.Erosion, Buffer or F.Buffer by one in selected Collection
Piercing Blade: turn into purple totem
Sturdy Shield: turn into purple totem
Valiant Attack: turn into purple totem
Energy Riptide: turn into purple totem
(new totem): replace 1 stat in selected Collection with a different owned stat (Miracle Worker will affect stat if it was previously used on this Collection)
(new totem): Increase tier of one Insight or Tenacity by 1 in selected Collection
*Tiers can only increase up to Mythic+
Miracle worker turns into a one time upgrade for any Collection instead of leaving it wasted to the RNG gods so very often. It stays top tier but will now always be as reliable as can be.
The upgradability makes Collections flexible after etching and adds building blocks onto successful creations.
Mythic+ stay attainable only through legendary totems, but cannot be obtained during runs anymore, giving the upgrading more weight than the RNG.
The class totems will be able to upgrade rare stats like ERR, Crit and anything else desirable, so nothing will feel lost or misplaced due to its tier.
Collections are finally as flexible as they should have been and collecting stats for Collections seems like the greatest fit for adding a system of handcraftsmanship in a rather static environment.
The lack of legendary totems in runs might make getting good RNG runs a bit harder, but there is a sustainable progress of upgrading what one has received, and will in return feel a bit fairer to go through it.