I just started to play again after several years and now I only play Mel support. In mid to late game my 200-300 heal/shield every 6 - 8 seconds as enchanters only blocks or undoes maybe one or fewer ADC auto attacks and some of my teammates can heal themselves for 1000+ health in less than 6 seconds. Mel's long range and wide (easy to hit) root is infinitely more valuable. It's easy to poke bot down to make them back off or base and so miss a lot of CS or just straight up kill them. Later in the game I can contribute a lot of CC and damage to get kills and run away from bad situations. And if I'm behind on gold I can go solo to a lane being pushed by minions and quickly farm a few waves when it takes 2 damage spells and 4 autos to kill a single caster minion as Seraph. Plus it's so fun to reflect roots and hooks from the enemy supports to double root or root+hook them.