[MutesToCry]

To put my own two cents in to make this seem like a better aspect in general.

Remove Shock from Lightning (Because its bugged to high hell)

Make Arc of Devastation an Intermediate (Hear me out)

Change its name to something else to compensate for the lacking name.

Bring back cloudburst from the old Holy Lightning tree from Spires. (Increase that range but not the damage) and make that the master.

Raise Piercing Strike's CD from base 32 to 34 seconds.

Keep Arc the same damage, but increase CD from 30 to 32 seconds.

Cloud burst back in spire was basically what Hellstorm gem is, but The Hellstorm (Original) Slows, the Holy cloud burst was a variant of Bolt that would rain down like I think it was 4-5 power bolts every 1.5.-2 seconds you were in a 5 tile aoe? No pull or anything, no slows, just raining damage. For lightning, that'd be pretty nice to have and not to mention Lightning would have a little more utility with a lower damage spell.

I think it lasted like 10 seconds so you got hit by like max 5-6? So adding that up that's like 25-30 power back then? But it was easy to walk away from? Yeah, might be a little better sounding. Hell lower it to like 7 seconds of AoE, but it hits every 1.5 seconds of 4.5 power bolts, maybe CD of 35 seconds maybe 40. But just a suggestion to give a master Lightning deserves rather what it wants. Because if you make Arc to strong (Like increasing projectile speed) Then effectively you can get a free hit off of it like Prism beam does for Light. Make it an instant cast like it too and then you get people shitting themselves because it'd do way more damage over a longer and wider tile range.

Even if you change Arc, some Masters like Blood's out class it with its innate abilities like Severance's Teleport. Or AoE damage from VV. Or EVEN! Energy's master spell to deflect damage. But, as it stands, Arc doesn't need a damage nerf or buff, but just given utility like Wooloo said. Holy Lightning Cloud burst at the time was really based on utility in a fight.