Prefectly fine. The big male spiny and the milli cuddle up in the tube at night sometimes.
Lol probably end up with some weird hybrid species babies
I've also got a pair of ackie monitors which until recently were sharing with a pair of bearded dragons for about 4 months. Never had a single issue. Separated now that i have more space.
I suggest putting some metal flyscreen around the light cage... you'd be supprised how small a hole this buggers can squeeze into. Apart from that looks good mate plenty of branches for them and some leaves for shade.