Well I sort of assumed (with my hazy memory of it) it went like this:
Loadout for Tier 1: ST Rifle, Bowcastor, Demp2, Disruptor (and the three explosives; and of course your mandatory pistol and saber).
Loadout for Tier 2: The above, plus Flechette and Repeater
Loadout for Tier 3: The above plus Merr Sonn and Concussion Rifle
But if the loadout changed BEFORE the start of the actual tier, in one of the "required" missions, that is what I wanted to be sure of, so I could note that on that mission's page.
Likewise the saber changes, so I could note those on that page it occurs as well.
Anyway, I'm not quite home yet, but I should be tonight and I'll make those updates as soon as I can!