I even get 111/run on average (not fulltiming TH, just applying TH6 to all Alex mobs then dropping to TH3 again). I thought it was a nice enough number to mention. Those stats also include my very early runs when I didn't clear the west room on FL3, which I do now, so it's possibly even higher.
Less than 3 times as expensive on my server. Alex price has fallen a bit while Dynamis currency prices went up. Even with a relic loan a 99 relic will cost you about 35% of a mythic, without a loan closer to 40%.