Basically Hyperspeed Sparkle's first skill isn't needed to get to 10 Lightning Lord Stacks so you can use it to buff a 2nd DPS on the first turn in Cycle 0, this works best on Clara, Topaz and Xueyi. This allows you to do 0 cycles with a dual DPS on bosses that Jing Yuan usually can't 0 cycle like Sam.
Basically Hyperspeed Sparkle's first skill isn't needed to get to 10 Lightning Lord Stacks so you can use it to buff a 2nd DPS on the first turn in Cycle 0, this works best on Clara, Topaz and Xueyi. This allows you to do 0 cycles with a dual DPS on bosses that Jing Yuan usually can't 0 cycle like Sam.
E6?
E2S1