Kristjan,
I'm not sure how many short scale Epics are around but first you might try a regular (34) Epic 4-string. I have 4- and 5-string Epics. The 5 feels a little wide for my average sized hands. I can only imagine how wide a 6 would feel. After getting my 5, the 4 feels nice and compact to me.
If you can't try out an Epic 4, try another brand of 4-string with the same neck dimensions in a 34 scale and see how it feels. The dimensions can be found in the product section of this website.
BTW, welcome to the club and congrats on getting your Alembic.
Rich