Just Radiant Shards collect and sell them at high prices , for example : 300 Radiant Shards = 1k Flux. Quite a profitable way .The bottom line is that it is better to sell them when Radiant Shards need very much . Then there is at least some return on earnings.

Rings. What we know about the rings ? The fact that they give extra stats and the cost is not small. The method consists in creating S4 rings. Here as Russian roulette , you never know that the fall or get all or nothing . The cheapest S4 ring is 40k flux, not a little, huh? To do this we need to have 9999 and 250 flux Ringcrafting Skill. Just create the rings , and then luck will tell.

Sell ​​soul rather interesting way of collecting flux .
Knock subject - Parse - Homes for the soul if it is.
Repeat until you get the desired amount. The process is quite easy , but it is long and requires patience .