Should I bother levelling up saber mebd and mhxx?

So I just burned through 300sq and ended up without summer BB :(
I did, however, get spooked so many times and ended up with 3 copies of saber mebd and 3 copies of mhxx (u could see how I was pretty sad when I saw golden sparks then the saber class)

I already have a lvl80 saberlot and a lvl90 abby.
I just burned through my ember reserves leveling up archer jeanne and skadi.

So do u guys think they’re worth leveling up?