Lightning Strike projectiles damage formula?

Go on tooltip, take dps and 'physical damage x-x' and 'lightning damage x-x' and just multiply them by 0.70. Thats the damage each of the projectiles does.

With lmp you multiply by a further 0.70 and you have to add 38% increase projectile damage, which the tooltip wont show ... but 0.70 alone is a a good approximation.

Also any increased projectile dmg passives you have count towards the projectiles only and wont show up on the tooltip. As well as point blank passive.

Actually, unless you got iron grip its not as simple as taking tooltip dps and going x 0.70, because str only works on melee part of attacks. Get iron grip :P