Since the update swordsmen are twice as fast to recruit and less than half as costly, so anytime you can substitute swordsmen with less than 2x losses will increase both time and resource efficiency. YWC lends itself fairly well to this strategy (better than I thought it would), so I got bored and worked it out last night. I have 3 MMAs with 1-up and only Vargus for CoAs, but you can certainly adapt if you have more gens to decrease losses further. The only battle with MS losses that is unchanged is L1 because C2 would need to be blocked and you would lose xp bonus from Mary.
G1
C1) 180sw --- Tav - 196ms (BLOCK)
C2) 110dm100scn ---
L1) 120ho80dm1ST --- MC - 47ms168mm (kills C2 otw)
G2
C3) 80sw80mb --- 3xMMA1r, Var - 21ms58am116mm OR 37s58am100mm
opt) 90scl100dm --- MC - 170+mm
C4) 150sm --- Tav - 196ms4am (BLOCK)
C5) 70sw70ho50dm --- Tav - 148ms40am (BLOCK)
L2) 80ho90dm1GT --- MC - 31ms142+mm OR 52s142+mm
G3
C6) 90scl80mb --- Var - 21ms142+mm OR 34s142+mm
C7) 70sw70ho --- Tav - 150ms10am (BLOCK)
C8) 90scl90scn --- MC - 90am90+mm
L3) 80ho80dm1MT --- Maj - 31ms214+mm OR 52s214+mm
G4
C9) 70sm50ho60dm --- Tav - 164ms36am (BLOCK)
L4) 90scl80ho1TT --- MC - 35ms120mm60b OR 59s88mm68b
C10) 70dm70mb --- Tav - 126ms (BLOCK)
L5) 90ho90dm1ST --- Var - 33ms162mm OR Maj - 59s155+mm
G5
C11) 90dm90mb --- Var - 23ms132+mm OR 38s132+mm
C12) 100dm100scn --- MC - 100am80+mm
C13) 180sw --- Tav - 196ms (BLOCK)
C14) 50sw70sm40dm --- Tav - 160ms40am (BLOCK)
L6) 80ho80scn1BL --- 3xMMA - 1mm, Var - 50kn, Maj - 285mm
Relevant skills are:
Mary with juggernaut, overrun, 2/3 frenzy, annex, planner
Vargus with juggernaut, overrun, 2/3 frenzy, unstoppable chg, annex, planner
Major with overrun, frenzy, annex, planner
MMA with juggernaut, annex