Hellomello13

Sorry for the lack of specifics but I'm lazy right now: does anyone else have trouble with ragna's second combo on the challenger mode's mission 3? whenever I have to do a 5B the second time around its blocked or not in range, do I have to dash before triangle even though I'm not told to? (Also not really for the thread, but are there better ways to master combos -practically- without challenge mode i.e. training or specific online rooms etc...)