OK I am stuck in another place that seems from the cluebook like it should be straightforward: How do I get past Orkin Stronghold IV? Rot13 again:
V'ir orra noyr gb trg gb gur bhgre evat bs gur abegurea unys (naq gur vaare cneg bs vg gbb) naq gb gur abegujrfg gbjre juvpu unf gur hapyvzonoyr cyngsbez. Gur evat gb gur abegurnfg gbjre frrzf gb or oybpxrq ol vzcrargennoyr fzbxr pybhq va obgu qverpgvbaf. Ba gur rnfgrea fvqr gurer'f n oenmvre jvgu n dhrfgvba znex ba gur bgure fvqr, juvpu frrzf yvxr bapr V trg gurer V'yy or noyr gb xvpx vg bire, ohg V'z abg ba gur bgure fvqr lrg. Gur jnyyf va gur nern frrz gb or haqvttnoyr (V qht bhg n ybg nebhaq gur abegujrfg gbjre.) V'ir gevrq trarengvat jvaq naq hfvat gur sbt-qvfcrefvat punag ba gur abegu fvqr, jurer lbh trg gur zrffntr nobhg punagf, ohg gurl qvqa'g qb nalguvat. Zl gjrravat fcryy nyfb snvyf gurer.
The other obvious bottleneck I have is in the Castle of Mirrors but I'm pretty sure I know what's going on there:
Gurer'f n cynpr jvgu funggrerq tynff jurer gur pyhrobbx fnlf gurer'f n frperg qbbe, naq V nz dhvgr fher jurer vg vf (fvapr V pna frr gur bgure fvqr jvgu pynveiblnapr), ohg V unira'g sbhaq vg rira jura jnyxvat cnfg gur fcbg jvgu Fpbhgvat ba. V guvax V whfg arrq gb fgneg chggvat cbvagf vagb Creprcgvba jura V yriry hc.
Anyway it feels like Orkin Stronghold is the better place to work on right now, because I've gotten a fair number of clues about ways to go forward that should open up once I finish that. (I've also done first explorations into the southern part of Divinity and the Gorge of Mists, but I'm pretty sure I can't get any farther there.)