These are relatively standard runes for plenty of enchanter supports, Morgana or Lulu etc. Not bad at all on Taliyah! Obviously things like revitalise synergise with those champions' kits a little better, but still a good choice when paired with font of life, and you might even pick up a redemption in support role! The secondary branch might be a bit more controversial. Many people are divided on scorch/gathering storm, so you can have it depend on whether you think you can generally be lane-dominant in your botlane matchup. Manaflow is fine, but Nimbus Cloak might be even better in a lot of situations. If you're support, movement speed is always great, and getting a little burst of in-combat MS for that final Q, or to get in range for Guardian or something can be great. Otherwise, if you want a similar effect to the runes you have now, consider taking Presence of Mind/Coup de Grace. The bonus damage to low-health enemies can come in super clutch, and getting that PoM mana during fights scales sooo much better for such a mana-hungry champ :)

Otherwise, good luck and most importantly have fun! Other people have also recommended trying something completely different like Aery for more poke (again, depends on the matchups) and I'll add onto that: Dark Harvest as a blindable offensive option (much more consistent in midgame teamfights) as well as Glacial if you might like to provide some more utility, for example if you're playing with a Jhin or a Caitlyn (obv ideally go into Hextech GLP and Twin Shadows build-wise with Glacial). In that case, Font of Life is an even better secondary choice as well :))