Bro get ppl to carry u in hard/ medium and invasion to the last wave plus defence aswell u will get atleast 3x more energy after that also go grind defence with other ppl till u get eternal on all the things that defence drops
Basically it happened to me, but how I am f2p I just do 50-50 in stats points and get focused in the eternals, like x5 of DMG ,energy and titans instead of leaving afk all da,y just for one new world, in 1 week went from slime to the last map only with being focused in the eternals.