I can now address some of your complaints:

• As of release 2.11.1, rods will no longer appear in random drops if the player currently has a rod of the same type. (Drops that were "locked in" before you found a rod, like vaults or chests, may still have duplicate rods; We Apologize for the Inconvenience.™)
• The orphaned talent entries in the Use Talents dialog for transmo'd rods are, as you suspected, a game module bug. Since it's not specific to rods, I've created a separate addon to work around that bug, Activatable Object Cleanup.

It was originally, but I forgot to revert it after learning more about how the talent that was using it worked.
Thanks for the heads up!

I'll lower the drop rates and implement your other suggestions.

It may be a bit until the next update as I'm fleshing out my first real class mod atm.
After that I plan on returning to this to add in tweaks, more items, and tailor the drops to the class you're using. (which I found out is possible! WOO)

I've commissioned Rexorcorum (the artist behind EoR) for some item sprites for the class mod I'm working on and I may ask for his help again on tailoring my sprites to his style and implementing them onto the equipdoll.
But that's all up in the air for now. No promises :P

Okay, I've been playing with the add-on enabled for a while. Thoughts:

• I've found plenty of Sunstones. They work well, though -- just a thought -- perhaps you should make them extractable like any other gems. Give them a tier 2 gold value (since that's what they are) and people can use them to create different items. You'll want to give them powers in line with what they provide for the items they're imbued in, of course.

• with a focus on light and elements, the new items are most useful for celestials, wilders, alchemists, and some archmage builds. So those are the types of characters who will be looking for these new items most often

• minor observation -- I don't know if you have the EoR DLC, but there's an artifact amulet called "Sunstone" that most characters will eventually possess if they play the campaign for any substantial amount of time. I can't see how that would cause any problems, but I figured I'd give you a heads-up.

• referencing my previous comment, I now realize you chose those two trees specifically, and named the items (moldy=fungus tree) accordingly, so disregard my comment on that.

All in all, good job with the add-on. I've yet to encounter any problems.

Doesn't show up in game options in the current ToME version?

Rest condition does not work. Sustein does not turn on during rest.
I wish they would support the default auto option supported by the vanilla game itself instead of deleting it.
I don't know how to set the option to always turn on when possible.

Okay, I've now found three items with Sunstone...material? All three are T2, but I can't tell if that's just a coincidence or if these items are innately T2. I haven't seen any in stores yet, so I don't know if they'd sell at the level of the normal material for their tier. The two defensive items I found seem to work as advertised -- extra life, -5% penalty on acid resistance. Do these things rise in tiers somehow, i.e. will I find a higher of tiers "Sunstone"? If not, they're nice items for the early game but will become too weak to bother with at mid- and late-game.

I've yet to see a crystal, so I can't offer any thoughts on that at the present time. The third item I found was a "moldy book". Its egos were 'lite' egos, though it was put in the tool slot when wielded. It gave me bonuses to talent trees, neither of which my character uses or intends to use, but since I'm playing an Adventurer, I can't tell if this would apply with a standard class. Are they completely random or, like amulets of mastery and perfection, are they usually limited to trees available to that specific character? I have an add-on, a Zizzo one if I'm not mistaken, that limits the amulets to applying only to trees I've chosen as an adventurer, which, personally, I think would be a great change here. But that's just me.

So far, so good. I'll look for weapons and crystals as I continue, to see how those work out as well. Thumbs up.

You forgot to eat the Heart of the Sandworm Queen (unless you were purposely saving it).

Those extra stats and points could have helped a lot.

But then again, I once forgot to drink the Blood of Life, thinking it was a passive that you were meant to keep in your inventory, so I can't judge you too hard.

Also, both alchemist quests were completed - you could have picked up both potions for several generic and class points.

Beating the Master is nice, but I see that your infusions REALLY need upgrading - the starter one you have are really bad and don't scale at all. Besides that, most characters should have a 4th infusions by lvl 20 (or even by lvl 10) - something like Movement is good for "tactical reatreat" (aka RUNNING FOR YOUR LIFE).

Once you got some good infusions, the Master should be much easier to deal with.

Could You top us up with some news on this !
Make it a Dark God's blessing

Looking for feedback on balance, drop rates, and when the items should appear in the game.
And any other suggestions you may have! This is an ongoing mod and I'd like to make it fun.

Many thanks,
~Rocketman