[All Your Pie]

The only figures I can think of with powers that can prevent OM movement or removal are Vulcan and Silk Specter. Those powers both reperesent personality quirks or emotional state, so giving something similar to the Daleks doesn’t seem to off base from a theme perspective. It’s worth mentioning, though, that both of those cards also have good mechanical reasons for having that ability—Vulcan has it to prevent you from avoiding the downside of Power-Mad, and Silk Specter has it because the Watchmen set has a lot of OM removal that can affect your own units in it.

Since OM removing powers in general are kind of all over the place thematically (from shakedowns to ice blasts), I’d want a good mechanical reason for the Daleks to be able to avoid it. Maybe give one of the Doctors a negotiation-style power? The interplay there might make single-minded feel more justified.