I compiled all the best combos I've found, feel free to tell me if there's something better:
--- Meterless Combos ---
Overhead starter: b2, f211+3 = 15%
Low starter: b34 = 16%
Safe(ish) hit confirm (-7 on block): 2124, f211+3 = 21%
Max punish: 1, 2 xx Fast Forceball, nj1, f41, f41 xx slide = 29%
--- 1 Bar Combos ---
Overhead starter: b2, f211+3 MB, f412 xx slide = 27% (damage)
(or) , walk forward a step, njp, f221+3 = 26% (hard knockdown)
Safe(ish) hit confirm (-7): 2124, f211+3 MB, walk forward a step, njp, f211+3 = 30%
Max punish combo: f412 xx shoulder dash, f41 xx EX swipe, walk forward a tad, f412 xx slide = 34%
Punish combo with corner carry: f412 xx EX time slow, slide, slide, slide, slide, f211+3 = 30%
Punish combo with corner carry and if slides reach the corner = f412 xx EX time slow, slide, slide, slide, slide, slide, f412 xx pounce = 33%
--- Slow-Mo Combos ---
Overhead starter: b2, slide, slide, slide, slide, f211+3 = 24% (hard knockdown)
, f412 xx slide = 26% (damage)
Low starter: b34, slide, slide, slide, slide, f211+3 = 31% (hard knockdown)
(or) , f412 xx slide = 33% (damage)
--- Force-Ball Conversion Combos ---
fjp, f211+3 MB, f412 xx slide = 29% (damage)
(or) , walk forward a step, njp, f221+3 = 27% (hard knockdown)
--- Corner Combos ---
- Meterless-
Overhead starter: b2, 21, 21, f412 xx slide = 27%
Max punish: f412 xx force ball, bjk, f412 xx swipe or pounce = 31%
- 1 Bar -
Overhead starter: b2, 21, f211+3 MB, njp, f412 xx slide = 32%
Max punish: f412 xx force ball, bjk, f211+3 MB, njp, f412 xx slide = 37%
- Slow-Mo -
Overhead starter: b2, 3, 4, 3, 4, 3, f412 xx slide = 39%
Low starter (and highest damage): b34, 3, 3, 3, 3, 3, f412 xx slide = 44%