[MCH] 123 Combo Help

[Rongway]

In addition to Myon's reply regarding mobility, because of the way ammo works, you will lose out on some potency if you go 1-2-3-1-2-3 compared to 1-2-1-3-2-1

1-2-3-1-2-3 goes like this:
Split: 140 base + 20 ammo bonus + 40 expected potency on Slug Shot (we call this +40 instead of +80 because without ammo it's expected to proc 50% of the time anyway)
Slug: 140 base + 20 ammo bonus + 50 expected potency on Clean Shot (we accounted for the "combo" bonus in Split shot, and are now accounting for "combo" bonus on Clean shot)
Clean: 150 base + 20 ammo bonus
Split: 140 base + 20 ammo bonus + 40 expected potency on Slug Shot
Slug: 140 base + 20 ammo bonus + 50 expected potency on Clean Shot
Clean: 150 base + 20 ammo bonus
====
Total 1160


If you do 1-2-1-3-2-1 instead,
Split: 140 base + 20 ammo bonus + 40 expected potency on Slug Shot
Slug: 140 base + 20 ammo bonus + 50 expected potency on Clean Shot
Split: 140 base + 20 ammo bonus + 40 expected potency on Slug Shot
Clean: 150 base + 20 ammo bonus
Slug: 140 base + 20 ammo bonus + 50 expected potency on Clean Shot
Split: 140 base + 20 ammo bonus + 40 expected potency on Slug Shot
====
Total 1190, 30 potency more than 1-2-3-1-2-3


(edit: original maths used 100 and 100 as base potencies for Slug Shot and Clean Shot; updated to include the 50% bonus)