I FINALLY got triple rainbow! It was an extremely hard dragon to get, lots of loooong fails including several sunrise, social and mindvolt (I think mindvolt hurt worse as it's the same hours so each time I thought I had it, but was disappointed)
Combo used was rainbow/lacewing (after using rainbow/origami a LOT, I swapped again)
22 hours
Pic of egg, if anyone is interested
Good luck, everyone