So, here's something interesting, if a bit situational. 3C is one of my favorite moves to throw out as Rachel. Unfortunately, its combo potential is pretty limited, especially on CH. 8D 5CC etc won't combo on counter hit, for example. (CH worse than regular hit. ). You can get the 8D 5B jc j.B j.C jc j.B j.C 236A for like 1.4k, but it can do better.
Another move with really bad combo potential is Rachel's new DD, Tempest Dahlia. Even that is situational because 6B CH is the only thing you're probably going to want to combo it into, and those are pretty rare in my experience.
Anyway, here's the point. CH 3C will combo into Tempest Dahlia Level 4. All the other TD levels? Still useless. Why is Level 4 different? Because Giant George will inflict lightning stun similar to Baden Baden Lily's. While you'll have nowhere near the amount of time to yourself that BBL gives, it's still enough time to set up some combos. Furthermore, 3C can ride its 3 hits while you're inputting Tempest Dahlia. With a little practice, it's as easy as can be to pull off.
Note that everything here doesn't work with your opponent in the corner, even with level 4 TD. This is because the distance between your opponent and the side of the screen the projectiles come from is more than it is at mid... they have just enough time to tech before the projectiles reach them. Just stick to your usual stuff there.
3C (3 hits) > 632146B LV4, dash, 6C 8D > j.C > jc.C > j.236A (3050~ Damage) 50% Meter, 2 winds
This is the easiest one. 3k for Rachel isn't too bad, especially off a relatively safe move like 3C. Not to mention this one is pretty easy to do. (You can also exclude the 8D, if you don't feel a wind is worth 200~ish damage)
3C (3 hits) > 632146B LV4, dash, 2D 5CC > 236B, dash, 214C, dash, j.C > jc.C > j.236A (3020~ Damage) 50% meter, 2 winds
This one is trickier, and the timing on 2D 5CC is a little weird. (You might whiff the second hit if you do it too early.) On the plus side, it pushes towards the corner, I guess?
3C (3 hits) > 632146B LV4, dash, 5B > jc.B > j.C > jc.B > j.C > 236A (2772 damage) 50% meter, 1 wind
Not really worth the meter, but it is a variation you can do if you feel like it.
3C (3 hits) > 632146B LV4, dash, sj 8D, j.2CD LV3, 236A, 3C (3 hits) > 214C > 6C > j.C > jc.C > j.236A (3772 damage) 50% meter, 3 winds
Yep, you can even combo into level 3 j.2C off of Giant George's stun. The timing and positioning is a bit trickier than BBL to me, though I'm pretty bad at level 3 j.2C on Baden too. The important thing is that you can do it, and it opens the gate for all of Rachel's favorite things to do after one of those Fatals.
You might be able to get two Lobelia off before you have to 3C, which will increase the damage here a bit. Personally, my execution isn't good enough to do that, if it's possible. But if yours is, give it a try.
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This is just something I've been toying around with the past few weeks. It's not some revelation that makes Rachel's damage not suck less, but it is something that hopefully makes TD and 3C more useful. Which is good for me, at least, since Tempest Dahlia is actually aesthetically awesome and 3C is loads of fun to toss around.