Skill slot change medal permanent

I am wondering about the Skill Slot Change Medal and if it's something I am going to need to play this game.

When I buy it, does that mean that I then have 8 skill slots to use whenever I want? or, does it mean I have two sets of 4 skill slots that I have to switch between, with some sort of mechanic that prevents me from just quickly switching between them in the middle of a fight to effectively use all 8 skills at once?

Is this really just optional and it's fine to just focus on using 4 skills?

Some classes need B slot to function properly (as in, they need more than the default 4 at one given time).

Yes you can swithc between skills mid dungeon, but that causes the skill to go on cooldown. Some classes like EM need those skills available at all times to play reasonably well.

Some classes need B slot to function properly (as in, they need more than the default 4 at one given time).

Yes you can swithc between skills mid dungeon, but that causes the skill to go on cooldown. Some classes like EM need those skills available at all times to play reasonably well.

And to clarify, it adds four more skill slots, so you can use 8 skills at any time. If you only play with four slots, then you can only have four skills on hand at any time (and like I mentioned before, this is incredibly restrictive when it comes to playing some of the classes).

Some can work around it if they say. have an ability that's only good for bosses, and another thats only good for mobbing or field clearing. You could use one slot and swap between the two during a run (although this requires standing still for two seconds and the skill will be on cooldown after-the-fact). The reason some classes can't really work with this is because nearly

all of their skills are situation that they don't have a true do it all that other characters are capable of (sometimes without needing skills in the first place).