This build is my fav so far good luck and have fun.
ltm can kill assasins with less than 25% health, push away ganks and reposition the enemy for a kill by your team her bombs are underated so you will always catch out a hero running away with 1 or 2 of them.
Medivac is used to retreat from the action when under fire, its used to get back to your team after you hearthstone and fun for moving your team around the map fast to take camps and objectives.
Tips: have at least 50% mana for teamfights.
Watch the map for anyone in a fight and help them if your not busy.
Ping the map to guide your team to victory^^