Cleon
Legend
Well some of them are pretty useless to him - Ythog's already immune to hunger and asphyxiation, and tends to reflect spells before an ellipsoid stone can absorb them (or is the problem that such stones absorb spells before he can reflect them?).
Come to think of it, the gem-encrusted throne and ioun stones might suggest he favours jewels for personal treasure.
Hmm, the various bonus-granting stones are all useful to him (dusty rose prism [AC], deep red sphere [Dex], incandescent blue sphere [Wis], pale blue rhomboid [Str] pink rhomboid [Con], pink and green sphere [Cha], scarlet and blue sphere [Int], pale green prism [attack, saves, skills, ability checks], orange prism [caster level].
That's nine. That leaves the Regeneration-grantion pearly white spindle and the Alertness-granting dark blue spindle for the tenth one. The pearly white spindle's regeneration is so slow his natural healing is faster, and it doesn't heal wounds he receives when not using it, so the dark blue spindle may be more useful.
That's assuming his ioun stones are not meant for gifts/bribes.rewards,
