The ‘right’ answer to your question is #2, but no really and I’ll explain.
#1. Buying put spreads (1930/1920) will add more short delta to your current NET delta of -22.
#3. Selling call spreads (2170/2180) will add more short delta to your current NET delta of -22.
#2. Buying OTM call with delta 11 will reduce NET delta from -22 to -11.
BUT…
IF you’re looking to make an adjustment because NET delta reached 22, this is not WHEN you should be looking to make an adjustment. When I say that I’ll adjust when short strike’s delta reaches 20, I am referring to either 1930 put’s delta or 2170 call’s delta in this example, not NET delta. 1930 delta is around 10 and 2170 delta is around 12 based on attached image. This trade does not need any adjustment until either strike’s delta reaches 20 or so. Now, WHEN it does reach 20, I will look at my NET delta to determine how and what do I do to cut NET delta in 1/2.
Hope this answers your question and clears it up a bit. Dont hesitate to ask questions because there are other members that might have similar questions and this will benefit all.