Gammadoodler
Hero
The wizard, and your sorcerer need to be within range of the area you are using for the sanctum when you start the spell.The Sorcerer doesn't need be stationary 10 minutes, the Sorcerer can expend his action each turn, but It can move and bonus action normally.
Shocking Grasp + Quicken Polymorph is a death sensence to be a Chicken Statue.
The wizard, after their simulacrum is removed is likely either using their action to fight or flee, and will have 10 minutes using movements, actions, and potentially bonus actions to do so. Meanwhile, best case scenario, the sorcerer is following along at half pace only using their movement, subtly mumbling to themselves and looking for an area to cast the sanctum (under the most permissive of interpretations).
Then assuming you somehow get the sanctum up with the wizard in it, you have to get within 30 feet without breaking stealth and win initiative (once that simulacrum is dispelled, surprise is done, the wizard is aware of you and looking to fight or flee) to land your combo. And even then you have to land both pieces of your combo. And even then, you'd need a second caster as flesh to Stone and polymorph are both concentration spells.