Why rush Statikk Shivv on Gangplank instead of Trinity?
Trinity is an item best built during the early-mid game. The AP gives a noticeable heal boost only early on, the Spellblade by Sheen and full Trinity are strong until mid-game and don't rely on crit chance to deliver damage (as opposed to SS). Mana is mostly an issue during laning phase and Phage grants the ultimate control of the lane once ahead (and is a good dueling tool overall).
The early Q-Shivv-crits are funny but imho GP benefits more and more consistently from early Trinity.
What do you think?
