This guide aims to use Gangplanks supportive Potential and improve it, as well as make him a tank crusher and Team-Support.
It´s my first guide, so feel free to point out any shortcomings and to suggest improvements.
Live long and Yarr.

Well, that depends on what you are aiming at - While you can be more tanky with other items, you GET tanky DURING the fight - at least a bit.
You wont need to be more tanky if you and your team communicate well. You are weakening your targets defenses, and that´s what your ADC and APC need.
You may be unable to eat a bunch of ults flying into you, like a fulltank Malphite can - but a tank can be so much more than a tank, and your team will thank you.
If your lucky and matchmaking has a good day.

- In the early game, play safe and concentrate on last-hitting with your Q.
- Focus on hitting enemy targets with high damage outputs first, and make sure YOUR damage dealers are hitting them to take advantage of their weakened defenses.
- Don´t waste your TP to get to your lane. You are fast enough with your boots and the Talisman. Use your E instead.
- DO NOT chase with your flash if the risk is too high. Only use it for escapes and for finishing a fleeing enemy in lategame.
- ADC´s wont be able to hit you without getting hit themselfes, and the only defensive item you build as an ADC is a bit of armor if the enemy ADC is too strong, if at all.
So, they wont have much MR. 300 Damage (before armor) to you means they take 90 PER SHOT. That´s quite a lot for squishy champs.
- Ult when your Team is in danger to slow the enemy or to save a turret. Your Ult is slowing and scaling on AP, so the Rageblade in lategame is a good choice for a little Ult boost.

+ Tankshredder
+ Can save your team
+ High Gold Generation = Get items done faster
+ Highly Adaptive to enemy threats
+ High end game potential

- Not as tanky as you might need it sometimes
- Low early game damage