Hey! So this is exactly the reason why I recommend going Manaflow Band instead of Absolute Focus for secondary runes. In the early game, try to use Q when you know you'll hit an enemy champion, and make sure you wait for the Manaflow stack to come back before you throw Q again (it's a 15 sec cooldown, you can see it dialing back above your HUD after you hit an enemy). After stacking Manaflow 10 times, you will get very high mana regeneration, so you won't have to worry about it for the rest of the game. Also, when you're gonna use your abilities, try to space out Q and W enough so that you can proc Presence of Mind 2 times (for example, throw out your Q, wait a few seconds, and use W on the wave that will ricochet to the enemy and proc it a second time). This helps to mitigate some of the early mana problems as well. And yes, in general try to use Q and W less often; you should use your auto attacks as often as possible to manage the wave in the early game.