I’m coming from a different stand point as I mostly am a climber who has started running and skimo training this season. If I use bouldering for strength training I keep that discipline of climbing at about 30-40% of my overall climbing training. I use the (rainbowing) as you put it as ARCing on easier terrain for 20-30 min loops with 5 mins rest for base building. The actual strength training of bouldering is hard 5-10 move powerful problems, with a lot of rest in between. If I’m going to do long harder loops or 4x4s on powerful problems that is happening at the end of my training season strictly for power endurance, kind of like interval training in running.
All that being said if your not really training for climbing and just want to pull hard and get movement skills you’re probably fine. I would only recommend if you split the longer bouldering loops into ARCing (easier very mild pumpy climbing) for 5-10 min loops and then keep the hard climbing to shorter more powerful problems you may see better results. The easier loops will improve your technique because the sheer volume and the shorter hard problems will actually test your fingers and muscles.
My power in climbing has certainly suffered from all the running but my technique is still pretty good and I feel fresh after a 2 hour climbing session between running and skiing.
Hope this is helpful! Enjoy the spring.