Do we know how much the Mirage armor set is gonna cost yet? Perhaps through a 343 employee offhandedly tweeting it, or through game file shenanigan’s that I won’t get into? I think I speak for everyone just about when I say we really don’t want to miss out on it by it unexpectedly being more than 2 points per piece like Orion was.
Its par for the course that it will be 2 season points per piece of gear, a full week of both pve and pvp season points should be able to get you the full set
helmet-2
Chest - 2
Shoulders -2
Arms - 2
Legs - 2
All of which when added up is 10 season points and they let you earn at least 12 every week, if you have seasonal stuff there are upto 29 points available to you, I would recommend hunkering down and grinding it out.
Oh I know, and I expect that more or less, but I just don’t wanna have any doubts and know it’ll cost the same as Orion.
We cannot be certain until it appears on the exchange or 343 share the information beforehand, but if you are really worried and Mirage is the cosmetic you really want, why not save your season points? Just in case.
I’m saving all I can, but I wanna use some on the other anniversary stuff between as well just because I’m not sure if they’ll come back either. Doing all 12 point-rewarding challenges every week though, and not spending any on the season so I can save what I don’t spend on the exchange!
Sounds prudent.
I had several dozen season points saved but I spent them all on season 8 unlocks just before the anniversary stuff was announced. As usual I have great timing. 
I am very certain that the whole armor set will cost 10 points. 343 has been very careful to not exceed a 12pts total value so that people can’t buy everything with the given weekly season points. The only exceptions to this rule are the bundles that remain on the exchange for longer periods of time, but it’s been confirmed that mirage will be on the exchange and not a bundle.
LOL I messed up too, myself, I completed all the seasonal challenges like a week before the Orion update was announced so I’m just relying on weeklies!
I feel for you guys… I don’t believe I have missed a week of seasonal challenges so I’m at like 224 season points banked at the moment