Playing with gelly-energy balls, sphere coalesence

Hi all, this is my forst post on UE forum.
I wonder how to achive a coalesence effect playing with two or more semi-liquid levitating balls, lets take a look in sytuation that hypothetical game is on VR, so i struggling with performance. I watched the "meta ball " live training but I dont have idea how to make that effect for more dynamic situations (like in real game).

Please join the discussion,
Cheers Z.

ps. little reference video