Using high-drag configurations or spins to escape IMC is a desperation move fraught with unpredictable and uncontrollable hazards. There's enough data in the accident record to say it often doesn't work.

If one planes to fly in wave close to lenticulars, there's a chance of becoming enveloped in IMC. To me that says having an attitude indicator and enough skill using it to keep the glider upright in turbulent air is an absolute necessity.