The guide said a Seer before RB could have 160 CON, so no, I don't think you've done anything wrong! (; But if it's the highest stat, then perhaps it's a little much. I guess it depends on how big the gaps between your stats are, and which other stats you have added. I don't know much about Seers so I'm relying on Sophieka's expertise and say that if you got high speed and seal enough enemies, you're doing fine.

I also just wanted to say a big 'thank you' for making this guide, now I know what I want my water to be! :D