Well, it doesn't have to be a blue healer team since she has a row enhance so any blue team would want her?
I...don't really have a strong blue set, at all. They're mostly all scattered and not too row focused. I could actually kinda make a blue healer, ironically. It'd just be super redundant and very weak though. Like..Gabriel/Gabriel/Ruka/Valk with I&I leaders.
Looking at his PAD herder, there's U&Y.
U&Y
Valk
Hera-Is
Kitties
Siren
U&Y
Doesn't seem too bad.
If I was gonna build U&Y, I'd probably do straight up prong madness.
There's no point in going healer without an actual healer enhance- and most healers can't take advantage of PRONG MADNESS. LKali opens this up, but otherwise yeah.
U&Y would probably be more U&Y/Athena/Genbu/Finn/Arthur/U&Y. Four orb changes and two redundant cards makes it -super inefficient-, but everything has a prong and it'll bash some heads in no matter what color gets the prong proc.
Optimally, Genbu would be swapped for GZL for an attacker boost that makes all the subs hit for 50x before prongs.