It is more like, she just pacifies you. Venusmon is not a fighter at all. Her entire thing is making you happy and lovey dovey. Dianamon and Apollomon maybe the only ones safe from sense disabling. Plutomon should be fine as long as he gets to howl.
This all comes down to if Plutomon can howl once. If he does that, the rest would be able to fight her.
Saori should win the 1v1s without much trouble due to Senses + Mind disabling and Nike and Aegis combo.
Facing all of them is where she will have some trouble, though if she utilizes her Nike and Aegis properly with her casuality manipulation, Cosmo burning and barriers and sub-atomic attacks she can overpower them since she can take a few out of the fight from the get go with her passive disable and cosmo attacks. Her Divine Cosmo should give her the strength to put them down since she can grow in power if needed. Plus her Immortality, Regen and overall hax resistances makes it's extremely hard to injure her much less kill her.
Power Null is Power Null. Special Abilities in Digimon range from just their normal haxes to traits. Every ability for a Digimon is a special ability. And remember there are no passive haxes other than the in-verse Digital Hazard. (Which isn't hax)