[ACE] TWO QUESTIONS, YO. ITEMS AND HOW TO ADJUST TEXT SPEED.

You should be able to add that parameter to the character if I'm not mistaken.
(Its PHA under Special Parameters.) You could make a skill that increases this
rate in battle by creating a new state,then creating a skill that gives the
actor the state.

And if you want to use potions as skills, etc... You could use the Yanfly script.
ie. it costs 15 potions to do something.

My bad.... That does sound a bit more complicated.

I would first create an item that added the PHA as an
invisible state then make the healing effect.

After that when you used the potion it should be more effective?
(would need to play test that.)

Then the trouble is making it so that state only occurs
when a certain actor uses the potion. Perhaps Common Event?

A simpler solution would be to make special potions that
only a certain actor could use.

I spent long and hard thinking about how to solve this problem.

Try going to Database, System.
Create a third thing under Magic, Skill (ie. Special Item.)

Create Skills that fall under this category.
But use item icons. You can then use the
Yanfly Script so that you will use the items when
you select the skill.
(It will make it look like you are using items, but in fact
it's really a skill.)