Hi, Becky. I know about Florida's root knot nematode problem. You're smart to grow these in containers. They might not last long in the ground.
Both of these climbers are China roses, which are tolerant of humidity, but Cramoisi Superieur has globular blooms and they might not open all the way during prolonged periods of heat and humidity. If the Clematis isn't suffering, the soil in the container is moist enough, so the frequency of watering isn't the problem. I think you just have to resign yourself to a less attractive summer flush on the Cramoisie climber because of the bloom shape.
Instead of pruning the long canes at the top, you could pull some of them over and secure them to the picket fence. That would encourage blooming at the bottom of the roses.
As for the two Old Blush climbers, they look very close to meeting at the top. Another year or two could be all that they need. I wouldn't prune them at the top, but I would secure those canes to the top of the arch instead of letting them grow upward. If you do prune the top, do it with a very light hand, taking off no more than an inch or two. Otherwise, you'll stimulate bushier growth below instead of vertical growth.
