Ernie Ball 2728

I always use this amazing strings for my 7-string Ibanez. They last long enough - the durability can be 1-3 months depends on how well you treat them in terms of using any additional cleaning stuff. Moreover, the first two strings never break!

The sound is great and fits my needs!

I use the same type for my 6-string e-guitar as well(6-string set of course).

I 100% recommend this string set

I've been forced to look for alternatives to nickel strings because of an allergy and those cobalt Ernie Ball never let me down. They feel slightly softer then regular string, great to play and they usually last me up to 5 months.

Really happy with these strings. The definition and action is unmatched. Tried couple of other manufactures and products.
I would say that 10-56 is the golden middle. And cobalt is smthing that is probably very addictive.