Something I'd like to open discussion on from the get go: the cost of t3 lunagems.
By default the recipe for a T3 Lunagem = 1x Sealed T2 Lunagem + 50x Superior "Type"glow Lunarite + 30x Sturdy Ingots
T2 Lunagems are pretty expensive as is at 20x "Type"glow Lunarite each.
Using 7day average prices as of 5:11 PM EST 1/31/20:
50x Fireglow: (46g each) = 2300g
50x Waveglow: (2g each) = 100g
50x Galeglow: (22g each) = 1100g
50x Sunglow: (68g each) = 3400g
50x Earthglow: (65g each) = 3250g
50x Copperglow: (63g each) = 3150g
The aforementioned figures solely encompass the approximate lunarite costs from advancing a gem from T2 -> T3, assuming you already have the T2 and 30x sturdy ingots.
Based on these costs, it's probably fair to say that full gemming is out of reach for many players. A full kit of T3 gems will likely costs more gold than the very armor (maybe not weapons) they are being socketed into, not to mention the raw gold cost of socketing. I could also delve into speculation about how this crazy demand for T3 gem lunarite will also drive the individual prices of lunarite up (resulting in even higher costs), but that is beside the point as these costs at current prices are already quite high.
My proposition is to simply reduce the cost of the T2 -> T3 upgrade recipe from 50x Superior "Type"glow Lunarite to 30x Superior "Type"glow Lunarite. In conclusion, the T2 -> T3 upgrade would still be more expensive than a T2 itself, but not absurdly costly.