in my opinion the game changes its enchanting success and made it very poor.. i mean i wasted 360k just to enchant a regular rare item and all i ever reached is +6.. wth? they made it very poor for us to use item mall in the near future.. i dunno if investing money on this game is worth it.. i also knew some players who already quit because of this freakin gold sink.. its just too much..
I personally believe the cost is fine. I can farm 500k an hour, so it's not exactly a large sum you speak of there. And no..... I don't farm emtlant mobs. I farmed floor 4 of temple, which has reasonable tolerable monsters, high gold output, and also drops the expensive red I runes (particularly deathblow and wildsong).
So the gold cost isn't bad!
And getting to - isnt hard either, if you manage to get power stones. 3 of those stones are given to you. They don't always work out, but they do help ....
Any game with enchanting, you WILL have failures. You need to accept that. Otherwise you'll leave this game, find another game with the same application, and get mad at that game too.