Great skill tactics right here, pretty much what I did with the exception of the notification.I put my least important skills in the top two slots, or just leave them empty. That's because a text message or notification from our clan messaging app covers them up. I put my most important skills in the second two slots from the top, because they are never covered up by the keyboard and I can cast them while typing. I put the other skills I need in the bottom 4 slots. Lixes go on the second page so I don't accidentally tap them.
I also recommend to purchase hotbar slots as you have no idea on how many times you will click on a haste or a know by mistake. They are always best on the second page.