What is the best way to do this?

[NBalfa]

you can trigger it so that unit will get the ability after some conditions for example when picking the item (you can use for letters in a row as hotkeys e.x. v b n m) ^^

 

[Okay]

I don't think you understand.
Each class will be a SEPARATE UNIT, and if you can change, you switch which unit you have. If there are subclasses, they will also each be a separate unit.
Subclasses would be linear, its not like
class: archer
Subclasses: fire archer, ice archer, and electric archer
It is like my original example
class: Swordsman
subclasses: warrior, squire, knight
each subclass gets progressively stronger, not each subclass has advantages and disadvantages over other subclasses for the same main class.

and if you change classes, you need to be somewhere specific, like if you stand in front of a swords rack, you can switch to the class swordsman.

 

[Okay]

BUMP

comeon guys I need some opinions. I don't need help figuring out how to do this or anything, I just want people's opinions on which way will be best.

 

[Okay]

BUMPITY BUMP BUMP comeon guys please.