My advice would be to put in a deep (#2) reef in the mainsail and trim your sails to depower them. When sailing upwind, put lots of twist in the leech with the traveler/horse pulled past centerline towards. Ease the vang enough so that the top batten is falling off to leeward, beyond being parallel to the boom. Upwind, trim the jib so there's also lots of twist in the leech, with the genoa cars moved aft so the top of the sail twists open.
Make sure you've got enough backtstay tension to keep the forestay from sagging a lot in the gusts. A sagging forestay in a gust makes the draft of the jib deeper and the sail gets more powerful as the draft deepens,. Keep enough halyard tension on the jib to move the draft forward to provide more accleration/punch to get through chop.
In high winds, pick a flat spot in the water when you want to tack. The chop will stop you dead in the water.
Going downwind, if you don't know how to do a controlled jibe perfectly even in high winds, do a 270 degree tack. That's called a chicken jibe.
In the gusts, feather up as the apparent wind moves aft in the gust. Alternatively, you can ease the traveller (if possible on a C22?). or ease the mainsheet a vew inches evenly. .
If you're still overpowered with your sails depowered as much as you can, try dropping the jib.
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You can sail above a reach with jib alone, but you can't sail as high a course as you can under mainsail. You can point your bow high, but the boat will have more leeway and be slipping sideways. But try it and see how high the boat sails.
Here's my experience with sailing masthead rigs under jib along: I suspect it will go to weather better with the mainsail and no jib. The sail balance will be off, and the boat will have a tendency to turn downwind under jib alone. You will to counter this tendency with the rudder, which puts the rudder at the wrong angle to create lift. So the boat will have a lot of leeway.
The Cat22 is a lightweight trailerable boat with less than 25% ballast ratio, and will require you to reduce sail area in gusts stronger than 15-18 kts, unless you put crew on the rail to hike. I'd recommend getting a 75% LP jib with a 3/4 hoist for sailing in winds over 15-25 knots in a Catalina 22. It will balance well with a deeply reefed mainsail.
Judy B
Semi-retired sailmaker