Light swords of conviction from both
awakened Parti and Raia at Yuno and he did not simply use an attack to destroy the arrows but danced around them like they don't matter meaning he can move faster than light swords of conviction. Mereoleona never moved faster than light based attacks. She used an attack of her own to decimate light. In other words, Her movement speed isn't faster than LSC. It's her attack speed and reaction that exceeds the speed of light from Raia. Mereoleona's feat pale in comparsion to what Yuno has done as he casually reacted to two light users who powered up drastically.
InB4 getting stronger doesn't make your attacks fast
Yuno couldn't even properly evade Dark Patri. Lumi shits on Dark Patri and his family without even going full power.