>>528095264
Conqueror is actually BiS for Qiqi rn but yeah it takes some finesse to use.
The healing at max stacks thing literally doesn't matter at all. The important part is the fact it gives you like 30 AD when it's fully stacked which is 3 longswords or about a thousand gold worth of stats.
When you combine that statstick with the very high AD scaling of Qiyana's earth Q execute it adds up to a lot more damage than electrocute can offer especially in longer fights such as against tanks, bruisers or multiple people.
If you're just starting with Qiqi it's probably better to run Elec though just because it's a lot easier to learn her with