hello fodder Ha--second good laugh I've had here today!

Whoa--nonce once (eee, say that ten times real fast) meant 'the one':
It’s an uncommon word outside dictionary making. It usually turns up in the fossil phrase “for the nonce”, meaning temporarily.

It’s recorded right back into medieval times but was originally created by mistake. It was at first then anes, meaning for the one purpose or occasion, where anes is a variant form of one and then is a defunct form of the. But people misunderstood where the break between words came, and turned then anes into the nanes (said, I think, as though it was spelt nanse). Eventually this evolved into the nonce. (This isn’t the only word known to have been transformed in this way; for example there’s newt, which was at first an ewt, and nickname, which started life as an eke name.)

The use of nonce in the sense in which I employed it seems to have begun with the compilers of the first edition of the Oxford English Dictionary. In fact, the entry under nonce in the Second Edition cites the editors themselves: “nonce-word, the term used in this Dictionary to describe a word which is apparently used only for the nonce”.
From .Quinion's World Wide Words

hapax: word which occurs only once http://phrontistery.info/h.html

Hmm--I tried mant- and manti- with no luck; then I saw a listing for mantic, and lo and behold:
mantic

SYLLABICATION: man·tic
PRONUNCIATION: mntk
ADJECTIVE: Of, relating to, or having the power of divination; prophetic.
ETYMOLOGY: Greek mantikos, from mantis, seer.
bartleby.com

And if neither Onelook nor Google finds the word manticratic (other than G's 'Seven Pillars' listings), far be it from me to say it's not a nonce-hapax.

[light bulb] mantis, seer Thus, praying mantis!! I had always supposed that mantis was just some scientific name for bug.