There's one other option for making the best use of your triple crankset while reducing the weight of your bike and improving shifting performance.
You can switch to a narrower cassette like an 11-19 or a 11-21. That gives you nothing but single-tooth jumps with the 11-19, and just a missing 18 and 20 on the 11-21.
Nothing to buy other than a cassette and a new chain.
Double are overrated. Very-close-ratio cassettes with triples are great.