Well, I havent practiced combos with robot cyrax in a while. The combos are fairly new so I guess its up to us to determine whether they are viable or not in a tournament setting. I havent seen anyone land the reverse uppercut stuff consistently yet. are you dashing under the bomb after the reset to get the b2 after turning around or are you dashing backwards (away from the bomb)? I found that dashing backwards is easier for me.