Jeffy and Weasel micro
Jeffy and weasel got enough LoS to avoid enemy units if you pay attention to them. They can harass outlying mexes and relay the position of the enemy comtower for a cheap price. Their slope tolerance is higher than other vehicles so they can go on places where other vehicles can’t go. If you keep microing them you can force the defending player to tie up his forces defending rather than harassing you.