at 38 im pretty sure yari is choice. unless you found 2 insane rares and dual wielded. but thats unlikely. go 3 shaeled eth yari.
however on a 39 dual butchers pupils i have found are alot better.
advantage: 12.5 hits per second. open wounds very helpful. lets you have the option to switch out one for whitstans for melee duels.(your block will be max).
disatvantage: shorter range.
socket both with 15 ias 30% ed jewels. this lets you reach 12.5 attacks a sec.
ive dueled many eth yari barbs using 1 puil + whitstans and almost always end up with half my life intact. you really notice the difference switching out 1 for whitstans.