There are overlapping requirements when determining what the ideal QL of bio-mat is, which is essentially the character level requirement to train Alien Technology Expertise perk tiers but also the character level requirements in terms of title levels. The ATE requirements override the title level requirements, as without being able to train the ATE perk at all, one will not be able to equip the AI armour altogether.

Another important factor that one may consider when determining which bio-mats to keep, is what the theoretical maximum ability requirements that one may obtain in order to equip said equipment. For example, a character of level 152 can technically use ATE3 title level 5 armour (assuming the character has already done Uncle Bazzit's quest) which has a maximum QL of 270, but would the character realistically be able to achieve the required 901 in primary abilities to equip it?

But whilst the armour QLs with the lowest requirements for that title level would be the most easiest to equip, bear in mind that: