Rhymer Firesprays are very good and very expensive. If left unchecked they will cause mass destruction. My issue with them was that if I faced any form of enemy squadron the amount of use i got out of them cut drastically as I wasn't bombing with them.
I still perfer to run 5x TIE Ints, Howlrunner, Dengar, Rhymer. I have flight controllers for 6 dice TIEs int on the run in with howlrunner, and then I have dengar for counter 4 (howlrunner) and rhymer lets all those blue dice (50% chance to damage i think) still threaten enemy ships. I typically out squadron my opponent and by turn 3 or 4 I am harassing lowering shields for my ISDs. thats also 8 squadrons which gives me 6 deployment actions so against the clone raiders with demolisher, I can always drop my interceptor ISD1 to counter demolisher. Its been very strong