I agree with arny. 1A is decent damage and it catches all.
And you shouldn't really focus on combos first. All you need to know is:
Any JS launcher or low -> 22B
GS 3B 22B BF 66B
You should really be learning what your good pokes are.
1B is my personal favourite, long range, hits grounded, tracks a little due it's big hitbox. Minorly unsafe. Freakey plays similar to me but he prefers 22B as a long range poke, which whiffs worse, doesn't track but probably has way better frames. 6B is good, too. Longest range. AA has good frames and hits steppers. WRB has good pushback, damage, and gauge damage while WR K is good evasively and has good frames. People seem to like WRA but I prefer AA or FC2A. JS 6AB can be really good, depending on how your opponent reacts to it. GS 3kA is a decent poke, too.
6K has nice TJ and 22K has nice TC.
1K, 11A and 2K are good for throwing out there, but never forget about 11B. 88K and 1A are your big gamble lows.
Use JS 22A and 66AA for whiffs. GS 3B for damage, and GS 44B when you think you can set it up safely. GS B+K when you think you'll land it.
Poke and step and back dash G a lot and there you go. That's Tira as I know her.
