Spellspeed weight on HoTs doesn't make sense

[StouterTaru]

If you want to figure out the difference, get a high/low tick sample size ignoring criticals, the ratio should be very close to 21/19. Then add at least 64 SpS and go again. For DoT ticks, you gain about 1% increase from every 64ish SpS (the same percentage that your GCD decreases by).

I would test this on an astro where you can arrow yourself for 60 seconds (though if you didn't detect any change you might reason that arrow is bugged). Likewise Astro has a built in 5% spell speed bonus you can tinker with.

Arrow doesn't change DoT damage, I doubt it changes HoT damage.