From all the threads that I have read so far, WHM could be similar to PLD and SCH to WAR.

They both are very good, with WHM being the more basic in its execution and great AoE heals, and SCH being more complex in its execution (more parts, more combos) and great in mitigation as well as individual heals. In a party of 8, they compliment each other perfectly when played well off of each other.

But I have only begun healing and took the WHM path, so no offense is meant to WHM or SCH by the above.