Shadow lairs are extremely hard, endgame dungeons that offer, by far, the most challenging environment in the game (especially due to the update). The rewards for completing each SL are materials that build into several armor sets. This is a fairly sound design, but the VAST MAJORITY of these armor sets are, quite literally, BOTTOM TIER.

For example, the last, longest, and perhaps hardest level in the game, Dark Fire Vanaduke, has a material that crafts into the Almirian Crusader set.
Almirian Crusader is the worst 5 star armor in the game. At the cost of MASSIVE fire weakness, it grants curse resist and no offensive bonus. This is never worth using, not in any stage, not even in its own shadow lair. The carnavons and traps in the lair can both deal fire anyway. To put it in perspective, Almirian Crusader is Black Kat set with curse resist and fire weakness, but it loses the damage max universal and the msi. Almirian crusader is weak even if you compare it to the Snarbolax set, a set from the easiest lair.

Infact, the Snarbolax set, from the easiest lair, outshines the sets from every other lair completely.

This has been said many times before in different ways, but with the shadow lairs getting ramped difficulty, I feel as though we can finally donate some power towards some of the other sets.