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Hello Exiles! This is a showcase of the build I've been playing in Brittleknee's Bingo League, which required the use of Trinity Support for the center square of the bingo card. Explosive Arrow ended up being a perfect fit for trinity support.

Noteworthy Interactions:

• In order to take advantage of Trinity support, you must alternate hitting with higher damage of one element, and then another element. Explosive Arrow has two portions, the arrow and the explosion. Since the explosion deals big added fire damage, as long as the arrow portion hits with higher cold or lightning you will always maintain resonance for trinity.
• If your arrow doesn't hit with any fire damage at all (no flat added fire on gear), you also can take advantage of Elemental Equilibrium to lower enemy fire resistance before the explosion (which is the vast majority of our damage, arrow hit damage is negligible).
• Explosive arrow doesn't leave charges if it pierces, chains, forks, or splits from an enemy. This means it doesn't work well with Sniper's Mark (which causes arrows to split off the target). However, you can actually stick EA fuses into hydrosphere. If hydrosphere is next to a target marked with Sniper's Mark, a good amount of the arrows will split off the target and stick into the hydrosphere, and the explosion will hit the marked target.
• We use Asenath's Chant helmet to trigger both hydrosphere and sniper's mark, as well as wave of conviction with combustion support to further reduce enemy resistance.
• Deadeye's Far Shot notable eliminates all projectile spread from our barrage, making it easy to always hit our target/hydrosphere from far away.
• Far Shot grants 60% more damage at range, but 20% less damage close up. By combining it with Point Blank (30% more damage up close, lowering as enemies get further away) we improve the worst case (close up) and average case (medium range) while only slightly worsening the best case scenario (far away).

PoB for the character in this video: https://pastebin.com/uaDmBV6h

Brittleknee's Bingo League card: https://i.imgur.com/fU0D8tI.png

Point Blank + Far Shot graph: https://www.reddit.com/r/pathofexile/comments/kxl0e7/point_blank_far_shot_interactionupdated_for_313/