I had read and heard and seen pics that Euphyllia corals will coexist in a sort of tie, so I am surprised to hear frogspawn over bubble.
With sps
Monti vs anything = anything, BUT the monti (digitata or cap) will adapt and grow around the offending party. I have a purple edged cap that has surrounded a couple of branchs from a thin branching acro.
My tank is becoming a study in acro wars as I have decided to forget about trimming corals and am just letting 'em grow. While there are minor stinging/bleaching of touching branches, all corals seem to adapt by growing in other directions. The will to survive has never been so apparent. Its kind of amazing. I will work on some pics. However, my next worry is shading, I may be forced to trim branches because of shading.
Jeff