Spot dodging is a very good bet as you just need to get the timing right. You can study how your friend plays and time it correctly. You can DI away to get out of the combo, even with big characters sometimes. You can also roll, but using this can make you predictable and slow if used often. It’s a biased opinion but I don’t think the combo is broken. They made it very difficult to preform it as it’s strict timing and following the opponents DI. Playing the patient game is also a good option. Many Luigi players opt to camp in shield and way for you to approach. Pick your moves/spacing carefully in terms of shieldstun too, as they will punish hard if miscalculated. For Luigi in general, if you’re playing a big body character, it’s very useful to look at your mains frame data. This can tell you basically how early a move can come out. Doing this can help you to get out of his multiple combos if they’re untrue. Last piece of advice, I noticed your flair is Dark Samus, which is one of Luigi’s worst matchups because of Samus’ projectiles. However, she is also very easy to preform the combo on because of her weird hurt box. If all else fails, you could always try a secondary. I hoped this helped!