letro and nolva do completely different things. letro will not in any way help your body begin producing its own test again, but nolva will (which is the goal of pct).
.25mg/day of letro will stop nearly all of your estrogen production in your body, but it wont be beneficial to your pct.
personally if you dont want to buy any nolva i would just use the clomid you have listed and any hcg if you have it.