Some Leo stuff (my character usage is basically Bob/Lars......... Leo, so I'm not claiming to be a top tier Leo, but I use her enough to know a few bits).
* h/m/l and stance mixups (BOK works like ling's AOP, KNK is an oki machine, KNK into cd/fc/ws (KNK~df) mixups are effective if you know how to condition your opponent)
* oki
* wall carry into wall juice (B! near the wall, then FC2, WS141)
* learn how to setup the parry (b1+2 and the follow ups).
* df2 is -13 on block. Don't abuse.
* supercharge leads to good blue sparky moves.
Moves
1) 14 - hh fast poke. 10f punisher, nc. does not jail iirc.
2) FC df3 - l, knd on normal hit, good when opp is backed near a wall as an oki setup as it leaves them FDFT
3) uf12 - hh, nc, hold 1+2 to supercharge. -14 on block, so don't abuse.
4) df2+3 - low, +5 on hit (making any of your WS moves impossible to interrupt), on CH leaves them FDHT, setting up oki. On block, it's -11, so all they can get is a WS4 if they have it.
5) db41 - lm, sweeps on clean normal hit. Leaves them FDHT.
6) BOK1 - nothing crazy on normal, but gives stun on CH. CH stun = df2 launch unless they shake out of stun (hard to do in time).
7) WS3/CD~3 - floats backrollers. Good oki, and works well on the wall.
8) KNK4 - similar to WS3, but I think WS3 is faster. KNK4 has good mixups though (4 for low, 3 for mid launcher, 2 for punch that stuns on CH).
9) df1, df3, and df4 are saaaafe. df3 knd's on normal, wall splats.
10) d1 (mid, hold d to go into FC for mixups). floats on CH.
11) ws141 is -7/-12/-14 on block. IIRC, it's ncc. Best used as wall juice, but ws14 on its own isn't a bad poke, just don't abuse (because of low parry).
12) b1 is great for oki against back rollers. Very good range, and transitions into KNK.
Juggles:
df2_uf4, f2, b1,4~df~uf1, b2,1+2 (B!), dash~df1+2,1+2,qcf+2 (a.k.a. "BBP").
if near wall, replace post-B! with FC2, WS141
CH KNK2, df1, f4 (KNK)~df~uf1, db22 B!, BBP.
CH d1, df1, b+21, db22 B!, BBP
low-parry:
df1, b14~df~uf1, BBP