Back again, these are the ones I am using now:
alias mirrors="sudo reflector --verbose --protocol https --country Germany --country Sweden --latest 10 --sort rate --save /etc/pacman.d/mirrorlist"
alias update="mirrors && yay -Syyu --cleanafter && paccache -rk1"
alias downgrade="mirrors && yay -Syyuu --cleanafter && paccache -rk1"
alias cleanup="yay -Yc && yay -Rns (pacman -Qqdt)"