If you're removing them for a significant amount of time, then what you're looking at is a taken out result.
Yes, but, would it be a straight up attack (ala the heart bursting spell with different trappings) or would additional mechanics need to come into play, such as thaumaturgy duration (sure you are implicitly choosing not to kill them, but they just plain aren't there for the duration of their taken out)?
Other than that, manipulating time is straight up thaumaturgy, I can't really see a way around that. You could go for a block instead of an attack in the spell though (you are effectively blocking any action the person can do)
Err, yes, obviously Thaumaturgy... I hadn't thought of the block implementation. That is actually quite a bit more amusing than a simple attack, though I'm not sure how that would end up working mechanically. Power for block level, power for duration (thaumaturgy duration or evocation duration?), power for area (runs into the no area all blocks rule, but maybe that isn't not too bad), and a note that the block is two way, nothing can do anything to them without breaking the block first. Perhaps putting discipline in as the resist skill?
Say for instance I put the spell as a landmine on my wards with the intent being to blink victims out for a day (or a month), beyond the ward strength, triggers and base power for the effect itself (either block strength or attack strength), what else is needed?