been on the mobile game FOR YEARS!!! been waiting for them to put in on the pc ones

I have 61 of 110, with at least 1 star on each mission, but I can't seem to unlock the next group. Do I need to have 3 stars on all levels to proceed to the next stage?

Like how the hell do you beat the final boss? He destroys the decent towers, anything I build gets overwhelmed by those ghost things. I've got to the boss twice now on veteran. Getting to the boss is the easy part but no matter what he cheeses it completely. This is the only level I don't have 3 stars on. I've tried a few videos from YouTube but most seem outdated. It's the most annoying level ever!...

Hi, i finished the first game on medium and it was fairly easy, not to easy but it wasnt much retrying. Now i reached the map where you unlock the necromancer and it seems impossible on medium. Maybe iam just bad but i have a feeling that you kinda have to use the Diamons store. I avoid it like the plaque, i hate the f2p remnant of the game. Is it possibly without the diamond store or does the game expect me to use it?...

i have tried this level multiple times in fact my character was level 4 when i reached it now its level 6, i have made level 3 towers everywhere, then upgraded the ones which i see benefiting other towers level 4, i have made some archmage towers as well, but the sand wraits with 800 hp ? keeps summoning infinite amount of mummies, my archers refuse to target the source of the problem instead they focus on the mummies, so the wraits dont die, i sent my character to stop them, but it is only temporary, one ...