Tier locations:
Tier 1 - Found in Dornar
Tier 2 & 3 - Found in Sekora lairs
Tier 4 & 5 - Found in Keep
Tier 5 - Found in Mormar
Tier 6/Primal Tiers - Found on LabRat Mormar -5
Warning - Mormar is very tough must be 55+ to survive,
LabRat is extremely tough.