I'm not a SCH...but I have to say, relying on crit and crit alone just screams "bad idea". Crit only increases the chance of getting a crit...it does nothing to increase the strength of crits; you need DET for that. Crits always increases healing/damage by 50%; lower base = lower crit strength.

What is your base Physic heal for? Base Adlo? Are you able to hit a 2K shield going full crit build on a non-WAR, no Eos buff or Convalescence?

Are you really willing to trade heal potency for a slightly better chance to crit shield (the only reason for this build), eating mana and never guaranteed to actually crit when you need it to save your target?

Just things to consider.