Pretty sure it does, in the sense that she can stack 2 burn tiles before the first one expires so for every shot after the first you have 2 burns active at once.
same couldn't get Horn,and the Birb somehow managed to get p5 before pretty much any other 5☆(Moreso, I don't even have any p3 5☆) The fate wanted me to build her,I suppose
me, who goes for liberiknight: I will raise her no matter what, she is the only operator who has block 3, who gives me the option to block bigger enemies like bullies (prays that 4 block isn't required so often) the arson is just a very practical part of it
I'll still praise Ashlock, but I like Firewhistle more. Yes, it's sad that Napalm bird's burn damage doesn't stack, but like you said most targets are going to be fried anyway. I love her flexibility even when compared to Horn S2, and Horn S2 is my favorite of Horn's kit. It would be weird if people call Ashlock outclassed though, as her skill cycling is fast. But Firewhistle is a very fun unit and everyone should build her.
i recall someone said in another vid comment that her S1 actually deals more damage than S2 to single target if downtime is calculated. i kinda hope it was elaborate or tested here to know is it true or not