I mentioned some of it before, I think, but I thought better to make a discussion post for it.

Stackable Spears

Maybe make it so that Spears can be stacked to a small limit, like 10 or 15? It would have great integration with a few other mods, such as:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=604196908

Maybe have a "Spear Holder" for that, such as the quiver in the Archery Mod with a few slots.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=488009136
With that, depending on how many slots there is, there might not even be a need for them to stack, in regards to their individual durability, but it could still be good for when they are in your inventory and only spears with the same durability could stack with each other.
As you throw a spear, your character will auto-reequip a new spear for you to fight or throw.
If paired with something such as Auto Catch (Server)
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=822485209
It could be possible for the character to automatically grab spears on the ground as well, adding to your spear-bag or inventory.
That would make for an interesting fighting mechanic, as you would throw a spear, run, lure the enemy away from the spear on the ground while grabbing a new one and not having to stop the fight, throwing your new spear, running to the previous spear you threw to catch while grabbing a new one.

You could then add a certain chance for "reduce durability further" as if the spear hit in a bad angle and a chance for immidiate breakage if the durability is too low.

Could be good to add the Golden Spear to your mod as something permanent as well, as its original author abandoned it, it is already compatible but hasn't been updated since September 2015.
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=386087632
It would also open for you the possibility of making new kinds of spear in the future.

This whole fighting system would work in a pretty interesting way with "Repair Combine"
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=767776640
As you would have the choice to fuse two spears with low durability after the fight or keep them and risk them breaking during a fight but having a higher number of spears to use.

One thing I find really interesting in the Archery mod I mentioned before, which I do not know how hard or easy to do it would be, is the act of "aiming" by clicking and holding with the left mouse button. Which if not done has a chance of missing the target, depending on the distance and could also raise the damage depending on for how long you do it, with a limit to how long you need to hold until maximum charge and auto-release.


Well, I guess that is it >.>
I really hope you find it interesting and I just want to say how much I love your mod again.
It will forever be a permanent mod in any server I make ever since my very first one.