Lightning Strike Multiplicity

[Fibus]

Will all upgrades apply on the second lightning, so it has a chance to explode/chain and crit, for example? If so, this skill bonus will be powerful.

Will charging lightning give the second lightning the same 25% explode/chain chance from electrical discharge upgrade?

The second Lightning Strike will have all of the same upgrades as the Lightning Strike cast by the Sorcerer. If the Sorcerer casts a normal Lightning Strike, the second strike will be normal. If it is a charged Lightning Strike, the second strike will be charged.