I don't think you'll get the cards you need all at once for your combo to set off.
Uruk Spy: I agree with c10ckw0rk: If your opponent knows you are going for burdens, why would they put on the ring? Your shadow lacks punch to do any serious damage, so they will just take exerts.
LttG is unpredictable without a good setup -- there's no guarantee you'll get burdens that way either.