The skill Sequence is put up here is just based on preference really just the start is important = go with Stun at lvl 1 heal lvl 2 and armour lvl 3 then you can skill heal armor or stun if you like depending on your enemy lane setup, remember make use of your passive since thats your main source of damage

Well you are an AD carry its not that strange

you need some more armour since you are playing an armor tank as ADC