I tend to agree with the run two squads with one in each approach, and also with the observations that anything beyond 3 or 4 stacks of shred provides negligible returns.
I run a g12 Kenobi swamp (GK lead, hoda, Wampa, Thrawn, Sabine) for 6-8% in heroic P2, and there really is no noticable difference in damage output from 3 stacks of shred to the occasional 8 or 9 stack run. Literally, Wampa miiiiiiight hit one or two thousand points higher on damage at the end of the run, but since he is usually hitting for 110k-125k by then you just can’t tell.
(I also used to run the boba version of this team with very similar results, boba lead, hoda, Wampa, Sabine, Thrawn. It has a bit higher potential damage, but it is really hard to keep everyone alive until the late stages of the run, a high gear Zaalbaar swapped in for Sabine could provide the tankiness the team needs to shine though - but my boba has been reassigned to p3 for Bounty and the Beast)
I also run (if hoda escapes from both Kenobi swamp and my still undergeared 3-4% Bastila/GMY/Ezra/QGJ/hoda or OB team runs) a low gear Machine Gun Leia team (ackbar g11, Princess Leia g11, Zaalbaar g7, Sun Fac g9, hoda/Jawa engineer g10) that with hoda alive and some decent RNG that Big Z survives long enough to land a second Armor shred can pull another 3% pretty dependably.