Pulling from a defecit will help you a LOT in the bottom of your pull. Just think How light the weigh will feel when it is all the sudden 4 inches higer for you.
Yse you can work up to heavy singles.
Other hamstring, post. chain exercises.
GM,. SLDL, RSDL, glute hams raise, hyperextension, pull throughs, etc.. A lot to choose from.
Hope that helps,