Synastry is a bit op.

[Damianqq]

Synastry: 50% extra healing to 1 target, total extra healing 50%
Divine seal: 30% extra healing to potentially 8 targets. Best case scenario total extra healing 30%X8=240%. worst case one target, 30%.
synastry op? nope.

Just a small correction. Synastry doesn't give 50% extra healing. The thing it does is, whoever you cast it on, will receive half (50%) of the healing you do on any other target.