Noticed while doing some combines, there are a few item quirks.
Small Pieces of Velium to Small Brick To Large Brick to Block arent all covered. Not a huge issue.
When I did the Coldain Shawl 1.0 combines for Shawl #8 (well, the imbued royal velium <slot>), it was requesting 2 sets of Etching Tools, but the NPC only gives you 1. The initial smithing combine requires an etching set, and also the JC combine (botht he cut gem and imbued armor slot) require the tools. they are returned on fail, and you never usw two at once. It's a bit wonky there. The scrape from EQTraders might be wonko.
Also with jewelcraft, anyting using a single / duo / trio setting tool, or a trillion cut / marquise / half moon / squad / round / etc cut tool, it insists on running out to Stratos to a genie to go buy the tool. Those tools self combine in a JC kit to make the next one. Also for TLPs (we're at lvl 100), Stratos doesnt exist, so it just hangs in PoTranquility. PLus the JC guys in PoK sell the solo tool. I went and bought multiple copies so the Lua script would stop whinging. A few combines (i need to go back and look for these) wanted a duo AND trio setting tool, when only one is required for the combine. I think I was making dwerium compartmented rings when I ran into that.
Also, I started fiddling with some edits for cultural forge smithing for cats, wood elves and half elves. was updating some cultural recipes as i did them (from forge to cultural forge) and did some fiddly work in the Lua so they'd actually go do the combine. any interest in that code, to save you some effort? I was fiddling while you had the black death. the woodie/half elf one is finicky because kelethin is awful.