Yes it’s proportional, someone with 16 SPD will act twice as often as someone with 8 SPD. Of course turn order is affected by other things like charge skills and status effects, but having crazy speed (it caps at 99) will allow you to have like 8 turns in a row. It’s broken and available from the start.
I’m lazy and I like to have Ramza buff himself by switching his AI to protect himself. Expect Ramza to level up a lot with this strat
Grandia series. I’m partial to the leveling systems but the battle system is fantastic. There’s ATB, field movement, charged attacks/magic incantations that can be canceled, a light combo system. I just love it