Boots of Ogre Mage Power & Gloves the Dire Bear
I took a look at UR boots in the game. I can not whine about Ogre. I just wouldn't have any problem if the Mithral set was partially reprinted with the boots being Mithral Boots, the gloves being the Gauntlets, and room made for Mithral Chainmail. But, I'd imagine that that or starting a multiyear reprint of Mithral will not thral people.
Charm of the Faerie
+1 Dex version of attack flying 1/room would be my preference of versions Jeff has posted for this slot if Mithral doesn't return. The FoP idea seems a bit much as only one room per dungeon I would imagine would have a flying enemy, so 1/game is a meaningless drawback; well, True Grind might be different, but it seems like True Grind is in decline.
Cranston's Helpful Hat
Even if +3 dmg Missile, consider how much gain over my usual running of Charming Crown in ranger head slot is. I would always swap out Crown without gaining another eyes slot. Also, damage seems not as "Helpful" as other effects even if it's a lot more "helpful" than other effects would be. I think of saves being helpful, whether static bonus or reroll or negate failed or whatever. I could see puzzle interaction effect, but these suggestions never go over well. Even plus to hit seems more "Helpful" than plus damage.
Ring of Expertise
I'm okay with bards/wizards only.
Ring of Quick Blessing
I'd much rather cleric only. Druids have gotten nice things in the past and will get nice things in the future; this year is supposed to emphasize wizards plus two classes I think could use the most love - cleric and human fighter - with Dwarf having to get something too.
Dwarf might get interesting things, but HF has nothing of its own in the game besides different attributes from Dwarf and, at 5th level, a reslide. Really wish there was more attempt to boost human fighter specifically, but it's too late in the game this year to try. Cleric has clear value in TD, but I think its clear value means that it ultrararely gets much love for keeping up beyond how both healers will keep getting healing benefits.