i agree with you completely. im a sage healer for PVP and i must admit 1 on 1 im unstopable (most of the time) 2 on it takes time to get me down. i can average over 200k healing with out breaking a sweat and had a PB of 420k in 1 round.
Tips as a Seer, dont stand still, use LOS alot. I rarely use my throws in combat, its all Heals, CC and bleeds. And dont run into combat, stay back coz you have good range as a healer and OMG that heal bomb is great if you get it off in the right spot.