Hey summoners. This is my first guide and since it sucks give me feedback! I choose flash and ignite because ignite for securing kills and flash to piss people off with you going over all the place. But other viable spells are

Heal: It's viable and good with your remove scurvy.
Ghost: Gets you all over the map and to escape bad situations.
Exhaust: Slows them down, less damage. Good for getting kills that are escaping or trying to run.

Now, pros and cons are on every champ here are Gangplanks:

Pros:
-He can be very dangerous when fed
-Viable farming with Parrley as he gets gold and mana.
-Can steal baron/dragon/kills with ultimate
Cons:
-Shut down easily if no health items
-Can be denied kills/farm if enemies aggressive
-No escape spells