Just curious to know what people think about this, because I don't know if it's a good idea or not. They obviously would need some re-balancing.
I mainly would like to see the Pith Pike and the Forging Hammer, because they make PVP and PVE fights so much more dynamic. I think they should be craft-able at the Ancient Pseudoscience Station, making them late-game items. I still think DST is really unbalanced if you are playing by yourself and trying to fight bosses solo. Yes, I know they are possible, but a lot of them require cheap tactics (e.g. fences for Beequeen or stone walls for Dragonfly). So I think adding these items would make these fights finally balanced and because they require a lot of effort to obtain, the difficulty is still there.
Darts would be pointless, and if they are infinite like they are in Forge, they would be way to OP. So I would forget about them.
Seeing some of the armor from Forge would be nice too. Although, a lot of it is very similar to what we already have.
Finally, I would LOVE to see the Living Staff in DST. It would make fights, both PVE and PVP, so much more interesting.
The Tome of Petrification is too similar to Sleepytime Stories and Infernal Staff would be too OP.