Here are some of my thoughts, i redesigned my Sub some time ago, and it works well for me
#1) I Started to using B12, after JP, it increased my dmg, and i can always cancel to clone/follow up pressure
#2) After Air to Air i follow up with dash 21, freeze, (B1)2, slide
#3) I started to using JP,B121 after freeze, so i can continue pressure easily
#4) If i decide to use normal bnb not b121, i use JP,B12,Freeze,NJP,Dash1,B12,212,slide easy to do and 38%
#5) Use D4 in pressure, its fastest d4 in the game, and give many frame adv so 22/21 is almost guaranted on hit
#6) Changed my Corner combos for most damaging, example
212,freeze,11,222
212,freeze,1,224,slide
214,freeze,(B1)2,224,slide
224,freeze,(B1)2,214,slide
#7 Use 22 as antiair more effective, also vs crossups, now its really hard to jump/crossup me, 22 is great great AA
#8 Changed my pressure, i like to use 21/d4/21/21/22/d4 etc. after 21 we are on neutral, and d4 is 8frames, so its easy to continue pressure, also u can fool people and make 21,d4,21,d4,212, also i like to troll with 22, instead of 224 i like to do 22,22,224
#9 I try to increase my dmg to maximum, so i like to do on opponents stuff like, NJP,dash1,b12,212,slide, or after freeze in air when i dont have time to B12/or NJP, i like to do something like dash1,214,slide instead of 214,slide. I Find that sub dmg is low, so i have to increase dmg to maximum.
#10 Also after, 212,clone on block in corner, after ex slide i like to add 4, so 4,214,slide for more dmg, also at 212,clone, throw into clone glitch, im adding jp for 3% more dmg
#11 when im trying to do ex slide into clone, im placing my clone midair, it hits almost every time
#12 Usefull stuff in corner, vs opponents with punishable wakeups, after 214,clone i like to do NJP, then not to fallow up with ex icepuddle, but charge B+2, and cancel into block, 90% of players will wakeups mindlessly, so other free combo
#13 After B+2 on hit midscreen i do dash1,B12,212,slide for 37% dmg its easy to do after some practice
I think thats all