Genienomics

I wasn't really trying to say if tree (or any other skill) is over/underpowered, just showing the value of using it compared to say a potion and what type of cost you'll have with other effects. For example, healing 2 is 500 stamina which means 1020 coin to have a 56% chance to stop bleed (genie dex is 40). Which would mean 1821.43 coin on average to stop it.

It's really just to point out what types of costs you'll be looking at to use it and I suppose also a complaint that the items you can decompose with level 1 of a tradeskill are the most economical choice. You would think higher level tradeskills would get you a better ratio considering the cost involved in getting them, and lack of use outside of crafting TT items.

If you assume 2 seconds per click to put an item in the trade window (likely slow), 12 items per vendor run, that's 24 seconds to put items in the window, lets give it another 1 second for the buy button, that's 25 seconds to buy items. Call it another 6 per decompose (3 on the decompose?, 2 to put the item in, 1 to click), that's 72 seconds to decompose, plus lets call it 3 seconds to navigate to both the trade list and decompose, that's 25+72+3+3=103 seconds to do a decompose run of 84 stones for 3360 stamina. Lets say you're going for 100k stamina, that's 30 runs so 3090 seconds or 51 minutes 30 seconds for 100800 stamina, at 205632 coin.

Next, lets use level 6 stones as those are the most time efficient of the ones I have the complete data for. Using the same times, it's still 103 seconds to do a decompose run which gets you 168 stones for 67200 stamina. In order to get 100k stamina, that's 2 runs, but really, I'm just going to use 1.5 runs (18 items) for 44 seconds in the trade list and 111 seconds decomposing (time to reach each menu included) for 155 seconds total. That's also 100800 stamina in 2 minutes 35 seconds for 356832 coin.

That's a time difference of 48 minutes 55 seconds for 151200 coin which works out to 3091 coin per minute. When you're killing stuff for exp, is your coin rate atleast that high? If not, you would be better off using the low level stones still.

Infact, lets take this a step further and use the level 3 items that give 20 Yiyuan stones per decompose, as that's the second best of my listed data (I should add a level 2 item in there just for completeness). Doing the exact same thing to buy items, every set of 12 items would give you 9600 stamina. At 100800 spirit (since the other two worked out to that value, I'll just aim for that to be consistent) it's 10.5 sets. 28 seconds to buy each set (16 seconds on the final set) is 296 seconds, plus 756 seconds of decomposing works out to 1052 seconds or 17 minutes 32 seconds to get 100800 spirit for 214200 coin. That means the level 6 stones would be saving you 14 minutes 57 seconds at a cost of 142632 additional coin. Are you able to generate 9540 coin per minute while killing? If not, you save money using the 20 Yiyuan decompose.

Similarly, the 20 Yiyuan Stone decompose would save you 23 minutes 58 seconds, at a cost of only 8568 additional coin. So that would be the better option provided you generate at least 358 coin per minute (~21k/hour) which almost anyone can do as long as they're not an extremely low level.

Of course, there's still the comeback of the value of exp/spirit in that same time but again, that comes down to your exp rate and the value you place on exp.

Thanks for the info with weapons. If doing it the way you're suggesting with crafting items, you would have a 67% chance for 12 stones and a 33% chance for 162 stones. That's an average of .67*12+.33*162 for 61.5 stones.
Two red jade=280
Sandstone=1k (though this could raise demand, so prices go up)
Pig Iron=1k (same as above)

That's 2280 coin for 61.5 stones which works out to 37.07 coin per stone and .9268 coin/stamina. That's a big improvement over the vendor bought options however that's not really a surprise that you can get stuff cheaper by crafting it though certainly something to keep in mind although it comes with a higher time cost.

If you were to buy a Leaf Cutter off a vendor, you would get 12 stones per for 960 coin which is 80 coin/stone or 2 coin/stamina. That's a little better than the necks I had been using.

Looking at things a bit more I'm finding that Rock Breaker is a slightly better weapon too
Rock Breaker - 64.82 Yiyuan average, 1 pig iron, 1 sandstone, 2 red jade

That would make things 35.17 coin per stone and .879 coin per stamina. Not sure there's anything cheaper than that.