Hi Vazkii, I saw your tweet saying that the endo flame it's not working, so I decided to test it.
It doesn't, in fact, work; I have put many items to test it, because I wasn't sure what kind of items does the endoflame can accept. the items I tested were: A block of coal, a piece of coal, a wood log, a wood plank, a fence, a fence gate, a charcoal, and just for testing a piece of alumentum. But the endoflame won't accept any of them, I waited until the items despawend and the endo flames wouldn't work. I had this issue before on botania ( can't remember which version), in which the same thing would happen but I would log off and log in and the endoflame would turn the item into mana, but this time it didn't work.
Here's is an image of the test, with the items mentioned before

Well, you seem to be missing a mana spreader. The flowers can't input into a pool directly, so you need to use a mana spreader to send it to the pool. Without anywhere to send the power, the endoflames shouldn't burn anything.