If you have Legendary Dreadnaught Headman's Chop and Devastating Critical, as well as Overwhelming Critical, using a greataxe your crits will be x6.
With this setup, using a greataxe with Superior Heartseeker, what will the bonus damage from Heartseeker be on a crit? 13d8 (base x3), 13d10 (max listed in description), or will it scale up to 13d14?