Average item level calculation needs fixing, as does lv50 gear progression

[Vaara]

The progression for a new lv50 should be that they run Main Scenario and High Level DFs until they have at least all i70 items in every slot.

They should not be able to enter the queue for Expert, HM Primals or CT until they have at least i70 in every slot.

The problem is (as you said) that getting i70 to get into CT doesn't match the drops that SE have set. If your only options are AK/WP and main scenario, all you are getting is i55 stuff and i90 stuff. So you are either under-geared, or you have all i90 stuff and there's not much point running CT more than once.

I think your requirements for Hard mode Primals are too high though. Full Darklight and Garuda weapon was overkill for Titan HM even when it came out. As long as you have the HP to survive stomps and a decent weapon, you're fine.