I love Dragalge's design, and she's been a huge help on my team! I've raised her since she was level 1. She's using Dragon Pulse, Surf, Sludge Bomb, and Thunderbolt. She owned the Psychic gym and could tank Psychic attacks. Though, I guess that would make her level 48+ compared to trainers' levels 40-48, but even as a Skrelp, she could hold her own against Pokemon far beyond her level. I don't recall a time where her low Speed was ever an issue in-game; random EV distribution must have helped.