Acausality is a bit weird. The only thing it would be a guaranteed resistance to is regular causality manip, but depending on the specifics it can basically just make you immune to anything that's not been shown working on acausals. Daughters are more akin to the latter. Either way, they affect people of their own status. For speed unequal, Morgan as of now would just have to compete with omnipresents and immeasurables. 4-Cs pretty sparse, so she's probably good there. As for time hax, the Vex can do basically whatever they want with time in their spaces, creating timelines, erasing people from time, ignoring the flow of time, all sorts of stuff. One of their spaces even has an infinite number of timelines, which isn't important to the daughters but just to kote. Daughters and crota stalemated the vex for 100 years of local time, and this was with one of the vex figuring out how to emulate their power. Btw, BFR and power null are on thought, both used at once, and death is on speaking, used immedately. Law, as stated above, is passive for invincibility, not passive for offense.