Fastest way to rank mastery?

[RiftwalkSniper]

Is there a fast way? What gives the most experience? Completing planets? Leveling frames? Weapons? I'm Mr7, and need MR9 to use war.

[Gelkor]

http://warframe.wikia.com/wiki/Mastery_Rank

[-Amaterasu-]

Frames/Sents/Archwings give most with 200 each weapons give the next most at 100 each levels are negligible but they do give something if you only need like 10 to the next level

If you really want to be cheap about it get a new frame and weapon and just sit in draco all day I guess that's technically the fastest way but either way you still need to wait 24 hrs between mastery tests even if you pass them

[Furutaka_]

Usually i'd build a ton of random weapons and just Draco until they're level 30, then sell them for the slots. Rinse, repeat for every weapon you don't want.

I'd suggest keeping your Warframes, though.