I am attempting a pokemon run where I can only use pokemon that have a single type. Here is the current team I have selected and the moves I an running. Items will come later:

Samurott - Hydro Cannon/ Razor Shell/ Megahorn/ Ice Beam

Sawk: Close Combat/ Brick Break/ Earthquake/ Stone Edge

Reuniclus: Psychic/ Focus Blast/ Shadow Ball/ Trick Room

Zebstrika: Thunderbolt/ Thunder/ Flame Charge/ Giga Impact

Simisear: Flamethrower/ Sunny Day/ Solar Beam/ Acrobatics

My final team member is a tie between karrablast and shelmet. Which one, given that they will not evolve, is better given what team I have? Here will be their respective movesets

Karrablast: Aerial Ace/ X-Scizzor/ Bug Buzz/ Double-Edge or Energy Ball

-or-

Shelmet: Bug Buzz/ Final Gambit/ Giga Drain/ Sludge Ball or Energy Ball