Holo battles: Hard+ modes - need advice

I’m really pushing the Holo battles to get that sweet sweet event trophy. But I need advice as to what type is easier + best team comp.

So far I’ve done grass and water up to normal, fire if I remember was a pain (if I recall correctly from CBT1) as most of my water Aniimo are healers.

Water was easy with plant Aniimo and grass is easy with fire, but haven’t attempted hard mode+ so I’m wondering, just for the sake of the event, what comp and element would be easier to complete?