While Sniper does make Crits deal x3 instead of x2, there are still items much, much better out there, especially since you are usually going to only be hitting two or three times and thus will have only about a twenty (two hits) to thirty (three hits) chance of getting a crit at all. As I mentioned in my earlier post about Cloyster, your are most likely better off with something else (plus, your multi-hit moves this time don't have stab). Anyway, you might also want to reconsider water spout. With 45 base speed, Unless you're using trick room it will be rare that you outspeed anyone, and, with 75/75/75 defenses, any decently powerful hit will significantly weaken that move.
Like Drachen Said, Soak Energy Ball is probably a better choice, but you also might want to consider something else entirely since your opponent will most likely switch as soon as you soak.