As a general rule for this sort of thing, you need to find a socketed (grey) scepter with the appropriate staffmods, or find a scepter with the right staffmods and check how many holes Larzuk's going to punch into it.
Remember that even if Larzuk could give more than 2 sockets to a magic item (which he can't), you still can't make a runeword in magic items. In this case I guess you'll stuff it with light facets, and if you can afford light facets you probably know this already. There you have it, anyway.
What's wrong with a Jeweler's War/Divine Scepter/Caduceus of the Magus (which, I assume, can spawn at vendors somewhere)? You'd lose one socket in exchange for +20%FCR, and I'm also assuming that's probably more desirable so that FCR doesn't have to be found elsewhere. If this is for PvP, maybe not, but explain it to me.