I initially thought coils gameplay was extremely difficult and I didn't quote like it. I wanted something more like Lucio, with aoe buffs. Then I realized he's not supposed to be Lucio. Coil is just a brawler that can act as a pocket healer for someone, AND you heal better when fighting better. Occasionally switch healing to a low health ally like a medkit, occasionally block dmg near an ally and heal them, spend S meter on healing when needed and speed when trying to eliminate someone, and ofc use speed on banhammer :)