In reply to Jack McKechnie:
It looks like you're a pure boulderer; is that right?
Everyone has said the same thing so far, so I'll try to say something a bit different, although I concur with all they have said. Clearly improving is important to you and perhaps it is particularly important to you to not go by going outside instead of training. You can train outside too, but it's different. If time is what you have a lot of, it will probably improve your climbing more than just indoor sessions because it makes your technique better.
I know that going outdoors over a whole summer can mean that strength takes a hit (it does with me every year, but I enjoy the climbing, so I don't care), but if you want to you can be strict with yourself and make sure some of the outdoor sessions are training on steep problems the same way you might in a gym. You'll probably have to eliminate holds and be inventive, but that will surely be a bit of fun too.
I'm only a punter, but I reckon there would be many people at your level or better who'd say the same
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