1)Premix wont help with lubrication if the engine runs out of oil.
Bearings will seize.

2)When they say "no rotor seals" that usally means no rotor seals/springs (meaning all metal seals/springs on the rotor)

I wouldnt run used metal apex seals unless they were under 50k miles.
Thats trying to get by,but thats where the most expensive parts for a rebuild is.

I would run Mazda OEM rubber/paper gaskets.
Atkins rotor seals/springs