my BnB with rain is
JIP - 4,3 waterbubble move the water bubble as high as you can, and so that the outside edge of the bubble aligns with rains head, backwards uppercut, dash, 4,3, lightning, roundhouse (wait like a second), 4,3 squirt gun. i cant remember the exact damage, but its somewhere around 50% meterless, but im sure its higher than 45%. landing the combo after the backwards uppercut takes a bit of practice, but online i can land this combo 98% of the time plus an uppercut in a combo is awfully flashy
i havent seen how much damage 3 enhanced bars would do though (or 2, rather.
can someone clarify wtf ex water bubble does?). the only thing is a lot of my combos i only do for damage output, not setups or etc.. but geyser kick as an ender is horrible for any setups afaik (maybe tele afterwards for some chip damage?), i'd much rather go with the squirt gun