I just found out that if you do 5B to 3C after the Katzbalger wall bounce, it does more damage than just doing the launcher alone. Didn’t realize someone had posted it already. 
I experimented further with T. Blade’s sweep (2C) and learned a really nice combo with baroque. The good thing about this one is that it doesn’t require Tekkaman assist to do, T. Blade can do it alone. Like the 2C + Tekkaman assist combo though, this will likely fail if you are at absolute max range, but since T. Blade moves forward when he does it, and the move has sooo much range, it’s pretty hard to be at perfect distance anyway.
Use 2C, baroque, 5B 2B (must delay slightly), launch, sj.A sj.A sj.B sj.B, dj.2C into one of the combos I posted previously that derive from dj.2C.
You can get excellent amounts of damage from a simple sweep that reaches so far away without using any kind of assist. With only 10% red life, you can do 30b damage if you manage to do the C ~ Katzbalger from this setup and end it with level 1. 38b if you end it with level 3. Just for reference, that does over half of Ryu’s life, and over 2/3 of his life respectively, from 10% red life, no assist, and one of the longest ranged sweeps in the game. At 20%, ending it with level 1 does 43b damage. Ending with level 3 does 49b, which is basically a 100% life combo on Ryu. Just know that landing the C ~ Katzbalger from this setup is even harder than doing it the usual way. If you have Tekkaman assist, then you can forget the C ~ Katzbalger part and instead do the easier assist combos I mentioned earlier for similar amounts of damage.
Just a little tidbit if you plan to do the Tekkaman assist combo after shamshir. You have to omit the second sj.B before the dj.2C, or else the air combo you do after the assist will drop. Just do the first 3 hits if you plan to use Tekkaman and all 4 if you want to do the solo T. Blade combo.
And here’s another one with Tekkaman assist:
j.C or some starter move into 5B 2B 5C, call Tekkaman, 2C, walk back, and proceed to do the 2C sweep + Tekkaman assist combos in my previous post. You can even extend it by doing baroque after the 5C and doing the ground string again, then continuing with the rest.