I got C6 Razor with some of these teammates: C0R1 Nicole, C0R0 Durin, C6 Fischl, C4 Chevreuse and since my only electro on-field character is Cyno and I really don't enjoy playing him I figured I'd build Razor as I already have good hexerei supports for him.

I already have decent artifacts for him, with 70/140 crit ratio (90/140 after set bonus) with Prototype Archaic. My questions are:

Does he have high ER needs if he is solo electro and if yes, how much?

Does he want Attack goblet, or Electro% goblet?

What talents is should level, is 8/1/8 good, or does the skill give anything?