How 'bout "lotsiscient" or "waymoreiscient"?
And there's that whole time/eternity thing which seems to get between some Protestants and some Catholics. I'd say that, at the least, the saints in heaven have all the time in the world to hear our prayers to them. And I suspect they are outside of time, or freer with respect to it that we are: a minute like 1,000 years and vice versa.
If they're not omniscient, then they drop things. A few prayers out there that they miss, eh?
But, HOW do they know someone's praying to them? What alerts them if they're not omniscient?