Longer scale instruments tend to have a really strong upper midrange, so I generally recommend pickups which have either a flat or slightly scooped midrange, or they have a lot of weight piled into the lower mids to help balance things out. The Impulse is great for this type of application, as is the ceramic version of the Warpig. Both of those have pretty flat mids. If you want instead to have a really strong midrange, then the Ragnarok is a great option to bolster those lower mid frequencies to give you a good amount of grind, without being harsh.