Combined
Attack Boost L3
Max Might L3
Aginator L3
Stamina Surge L2-3

area's unused per skill:
Aginator: helmet, waist(likely)
Max Might: Chest, arms, waist
Attack boost L2: Chest(super likely 2x attack with L2 + L1 slot), Leggs( 1x attack and assured L2 slot)
Stamina Surge: Helmet(2x), Arms(2x), Leggs(likely 1x)


each piece likely prediction:
Helmet: Stamina Surge x2, L2 slot + L1 slot
Chest: Attack x2, Max Might L1, L3 Slot
Arms: Max Might x2, L3 slot
Waist: Aginator L3 with L2 slot or 2x L1
Legs: Attack x1, Aginator/Stamina Surge x1, L2 slot + L1 slot

Total slots prediction: 2x L1, 3x L2, 2x L3