just saw a thread. as far as temp goes - you got the answer above, but I'd suggest night temp should be no lower then 80, humidity ideal 10-20% but will tolerate up to 40%. I would also suggest to rearrange foliage and branches, more branches like you have but in different sizes, smaller and bigger, on different levels, at least one should be about half of the frog in width in mid level, less foliage, should be branch right under basking lamp ( temp here should 92-95) if a frog chooses to go there. Those frogs need to have open space with branches only and some space with foliage and branches. they are very active at night, so 20 gal per frog , 30 gal for 2 would be great. also they are social frogs and need a company of their own species. It is better to keep at least 2 frogs together. It is really funny to watch them interact the next best after watch them to hunt.

light - ideal -full spectrum solar, but the one that UVB you got + with sun glo ( basking spot) are perfect as well. You'r right -waxys are probably the only frogs that require UVB, when I just started with them I was told to think of them as chameleon-beardie mix that look like a frog, i say it is pretty accurate

how Smeagol is doing now with UVB on?
dull olive color and hiding on a ground doesn't sound good what concerns me that he was in those conditions for 4 months and only now started to be unhappy, usually if something is wrong they will stress out sooner then that.