I like "country rat roving" a whole bunch and I use a steked on 38 case head. I usually up the head weight with flattened shot inside the case, so the arra balances well and has some punch when it hits. Never used a blade insert, but IMO that would probably be best, only I'm too lazy to go through that work. 38 case heads can take a goodly beating, will snap off on hard glancing shots that miss the target, and they force you to aim for head shots!
I use whatever good (but cheap) wood shafts I can find - I don't like shooting reject or junk arras as I hate missing just 'cause the arra is crap. Recently I've been looking around for more shafting and figure I might give
Allegheny Arrowwoods a try with their ash shafts (11/32" or 23/64", spined within 5# and matched to +/- 10 grains) at $75/100 + shipping. I make sure to give each shaft 4 wipes of polyU, with steel wooling between coats - super durable waterproof finish and adds some total arra weight.
I like my arras to fly like an arra is s'posed to fly, which shouldn't be much different than a field pointed arra or well tuned BH arra. So, I use a 3 feather fletch - each fletch is half of a full length feather, trimmed as long as possible (to around 4") and left full, not cut to shape.
As always, YMMV. :cool: