Water seer...quest build you say? This is gonna be a bit tricky but well see how i can help you.

First of all your gonna want to burst this acc to lv 180 this will give you 542 points to put on your acc including the 5 starter points and NOT including the Character bonus points like Sid's +2 on str and +1 on con. Waters lv fast in burst so it shouldnt be a problem. After getting to 180 go on quests before you rb get as many stars and % capsules and use the capsules once your done collecting there's about 200-500% in caps in wlo that's 2-5 lvs making your water go to lv 185 and you'll get a higher stat cape and higher stat % boost.
542
Str 0 nothing cause its a seer.

Con 160+ this will give you at the very least 2.6k hp if you want more go ahead.

Int 120+ your gonna want int on this acc so hell be a decent attacker if you need it to be.

Wis 60 no more no less in my opinion.

Agi 200 or less In my opinion if you want a FAST water seer go with at least 200 agi you can go less but if you have agi your highest stat the spd boost of the % stat boost after you rb gets higher.

Well hope this helps.