...You didn't happen to read my recent post did you? I came to the same conclusion, in 3* & 4* plate no less. I had ticked off skolvers Chasing my down to beat me with Max Damage and ASI auto-aimed Flourishes because they didn't want to be shocked and then shard/FF spammed by me or my teammates.
It was TOTALLY worth it.
But as to a Pure normal damage ISB....
Fiend bonus +3
Beast bonus +3
Slime bonus +6
Raise the base damage so that it matches the RSS's damage against neutral. (If you want to keep the CTR as is) or perhaps 10-20% lower. (If you bring the CTR to match the RSS)
Long live this thread!
And right now, I can see ISB being useful in Lockdown, for the surprise factor (Skolver Clone: "AAAAAAGH WHERE DID THAT SHOCK COME FROM") but the charge time is still ridiculous. And Pure Normal, please- we want to keep the salt theme, but the Slime bonus is absolutely useless on a Piercing weapon.