Bloons TD 6 - Ultra buffed engineer (with plasma monkey fan club) - BTD 6 Glitch

I found out about that newest glitch/exploit in @MackanRules video and i wanted to use it on engineer (cause the speed buff makes engieneer make sentries faster)
I also couldn't upgrade engie to tier 5 even though i sold the previous one. I don't know why

btw this glitch makes plasma monkey fan club apply to other towers.
I tried this on wizard monkey to but it crashes the game