Frankly, he pairs better with Ferrothorn than Jellicent does, since it's immune to ground and has natural Flying STAB to handle fighting-types that would otherwise be able to set up all over ferrothorn and beat jellicent with their Dark-type coverage move, and has the advantage of being a bulky water that isn't crippled by Toxic Spikes.
Here's a set to test out:
Pelipper @ Leftovers
240 HP/216 Def/52 Spe
Bold / Rain Dish
Scald
Hurricane
Knock Off/Protect
Roost
Dual STAB is important, but it can easily function as a status platform with chances of spreading burn, poison, and confusion. Rain team only, obviously, but it also has the advantage of being able to defeat all forms of toxicroak, who would otherwise give some rain stall team members trouble. Pure defenses might be better, but its minor speed investment makes it faster than a few things like low-speed Skarmory which might be helpful.