So if you add a 6A after the 236D dash cancel, the same combo does 5155 damage :D
Also apparently Rachel's hitbox allows some character specific combos? Dunno if anyone else has discovered this so I'll just put my findings here.
https://youtu.be/iIcJ7uV3ghs
Midscreen
5B > 5C > 6A > 214B >> 214D > (dash) 5B > 5C > j.214C > (dash) 5B > 5C > 5D > 236D > dc 6A > 5D > 22C >> 214A >> 214D
3980 damage, 28 heat gain, works on all(?) characters except Rachel
5B > 5C > 6A > 214B >> 214D > 5B > 5C > jc j.C > j.214C > (dash) 5B > 5C > 5D > 236D > dc 5D > 22C >> 214A >> 214D
4070 damage, 29 heat gain, Rachel only
Corner
5B > 3C > 22C > CT > (dash) 5C > 6A > sjc j.C > j.214C > 5C > 5D > 236D > dc 6A > 5D > 214A >> 214D
5127 damage, 20 heat gained, suboptimal damage but slightly easier(?) combo, 25 heat required
5B > 3C > 22C > CT > (dash) 5C > jc j.B > j.C > j.214C > 5C > 5D > 236D > dc 6A > 5D > 214A >> 214D
5155 damage, 19 heat gained, works on entire cast from what I can tell
5B > 3C > 22C > CT > (dash) 5C > 6A > sjc j.C > j.214C > 5C > 5D > 236D > dc 5D > 214A >> 214D
5162 damage, 20 heat gained, Rachel only. Something about her aerial hitbox makes Belial Edge hit one more time on her but no one else.