I agree about the weapon choices, and that killing as fast as possible is an effective way, but ghost+5B for small argos? lol young-gatherer does mostly 1s on unplated ghost. When I hunt argos at twin I use pretty much any weapon. Be it kesmek slo, H380+A103, Korss+103, HL6+A103, CB19+beast, etc. I use unplated ghost and on either of these weapon combos, even the kesmek or H380, I rarely need to fap, so I think that 5Bs would be pushing it.
If you read Jimmy B's thread on armour decay you'll see that if an argo young does 20 dmg, it will hit the armour for 15 dmg impact and 5 dmg cut (according to entropedia), then the hit is already reduced to 1, but if you have 5B plates it will hit the 5B plates for the same, and the 5Bs will decay in vain.