Support gankplank is really good?
I tried just for fun in a match just now. Started Q for the harass and 
for the gold and hp.
Using your Q on a minion will give you the bonus gold from the Q and share the gold/xp and give half its mana cost back. And he gets good AD per level so using Relic shield is pretty easy.
With my passive and Q I literally killed the vayne and blitz for a double after my graves died, and could decently solo the ADC but not before she got a bork and level 6.
Other than that, your passive gives DOT damage and a slow. Which is good.
Your Q is free harass and something to execute minions with your relic shield. Which is good. I maxed this second for the damage to help duel and win fights with my ADC.
Your W is a free cleanse and some sustain in lane. But I maxed it last.
Your E gives you more AD and movespeed and buffs all allies movement speed and AD so I used it before fights, and at higher ranks the movement speed it gives is amazing for running away. I maxed this first.
And your ult is amazing, the buff gives it more damage in a fight and it gives a decent slow, to catch out people or save allies
My build was 
It was also insanely fun, has anyone here tried this, and what do you think about Gankplank support? Because he has good harass, tankiness, good ult, movement and AD steriod.
instead of Veil to save an ally (who has no nifty oranges) and sustain your own.