Lightning Cannon Exploit
You need 3 Lightning Cannons:
A light lightning cannon
A heavy lightning cannon
A guardian lightning cannon
Put these 3 on your toolbar.
Then make a macro that switches between them. Heres an example
Say the lightning cannons are in slot 1 2 and 3 on your toolbar. The macro would be:
name macro: lightningcannon
Put in macro:
/ui action toolbarSlot00;
/ui action toolbarSlot01;
/ui action toolbarSlot02;
/macro lightningcannon;
Run the macro then beging attacking the target you want, the lightning cannons do not pause to switch between them. So you will fire at pistol speed and do rifle damage.