Skip Origins as well. Alternatively, watch Origins until the 2nd major Time Jump happens about 40 minutes in, and then stop. The movie looks like it has a shot of not sucking there!
The only reason to watch X3 is to add some context to the dreams in The Wolverine, though honestly, those are probably some of the weaker parts of the movie anyway as it comes off as "forcefully trying to remind us this is in the X-men canonical timeline!" In truth, the entire movie is kind of completely skippable; it's not bad, just very clearly came off something to give us between First Class and Days of Future Past (both superior movies.)
But yeah, X1, X2, 1st Class, and Days of Future Past are all varying degrees of good, The Wolverine is alright, but nothing special, X3 and Origins suck.