At Lvl 4 I'd say take Repeated Offense, the increased range and eventual damage is really good, but you have to be confident in hitting with your Detainment Strike, if you're not, take Majestic Span.

At Lvl 10 take whatever you prefer, if you're good at using Crystal Aegis it's really strong, but it's hard to time, and Resurrect is easier to use, and can also be used to turn a fight, though you have to be able to enter near melee range to use, and it takes 3 seconds for the ally to spawn.

At Lvl 13 take Piercing Lash if you took Repeated Offense at Lvl 4, if you didn't, take either Converging Force or Blinding Flash, take the latter if the enemy has Auto-Attacking heroes, if not, take Converging Force.

At Lvl 16 take Will of Heaven if you've got one or multiple strong Auto-Attacking heroes, if your team mostly has mages take Wrath of Heaven, remember, Will of Heaven will also boost some semi-Auto-Attacking heroes, such as Junkrat, his Q is spell-damage based.

At Lvl 10 take whatever you prefer, if you're good at using Crystal Aegis it's really strong, but it's hard to time, and Resurrect is easier to use, and can also be used to turn a fight, though you have to be able to enter near melee range to use, and it takes 3 seconds for the ally to spawn.

At Lvl 16 take Will of Heaven if you've got one or multiple strong Auto-Attacking heroes, if your team mostly has mages take Wrath of Heaven, remember, Will of Heaven will also boost some semi-Auto-Attacking heroes, such as Junkrat, his Q is spell-damage based.

At Lvl 20 either upgrade your ultimate or take Shield of Hope, this talent is really strong as a solo healer, Diamond Resolve makes the target nearly unkillable for 5 seconds, and Light Speed will make you able to use Resurrect more often, given the target lives for a bit of time.