rocket steelheads or wolverines will work just as good as any fixed head this side of two blade cut on contact. with low poundage bow though i would try fixed heads because the bow is so slow and shots should be kept under 25yrds IMO that tuning them doesnt take nearly as much as it does for high speed. but if your short on time put a good small mech like the ones i said on and itll do the job ive seen it personally more then a few times with a few people i know shooting 45lbs -50lbs. and i shot them back when i was younger and my high county deer hunter (given to me after my dad got a new one way back when) was only shooting from 48-55lbs for a few years. stay away from big cuts thats what takes up the energy and not the blade deployment.