Play agressive when shield up, try to shoot enemy heroes that walk up while shooting wave to double dip. Use your 2 on yourself in lane as you will have higher gun damage than your lane partner unless you need it to save their life - once you have guardian ward you can just cast that on them every wave and they shouldn't die. Try to throw your dragon at their tower when the minions land to hit all 4 OR throw it from the side to do the same; if you think you will root a hero you should also throw a dragon for the big damage. If the enemies dodge all your roots in lane just use it as an area denial tool or as extra wave clear. Your ult should be used to either save, kill confirm or cancel an enemy ult in lane - do not just spam it out to get it on cooldown