That's a perfectly good post, and welcome to Smogon!
I'd personally use something bulkier than Ambipom, so that they'll definitely use a fighting or other type move. Without any investment in its defenses, Shanderaa is pretty frail, and a Starmie or something could come in to Ambipom and try to KO with Hydro Pump/strong STAB move. Perhaps a Gliscor, to attract resisted Ice Beams? But Starmie or any Water type can hit that with their STAB move just as well, so it may not work so well. Just an idea.
EDIT: @420: Support Clause does exist, you can find the clause definitions in Policy Review somewhere; I don't know exactly which thread they're in.