Are you eventually able to grow your emersed crypts without the humidity domes? I have a few growing in covered tanks, but am irritated by the condensation obscuring my view. I've searched around for information on the minimum humidity for crypt growth, but have not been very successful.
I realize the humidity is very high where you live, but am curious whether these plants could survive at 75-80% humidity or at least a non-condensing level, as well as whether this requires replacement of all the existing leaves. I have sword plants growing in regular housepots without humidity trays, and they grow very well, but a similar experience with lucens was unsuccessful.
To Ibacha: I have grown Crypts in water that was under 70F. Your typical tropical plant is ok as long as you don't let the temperature get into the 50's. Some are much more cold tolerant, but then again, some are much less. Sword plants seem to handle temperatures in thes 60's fine emersed, but melted on me when submerged in similar temperatures.