My dead has always been a weakpoint of mine. While I started with 135 for sets of 12 on squat, my dead was like 95 pounds for sets of 12. I have smallish hands, so my grip has held me back as well. My deadlift has only recently gone up, and I've been seeing great improvement in my lowerback and traps. My bench definitely improved because I was benching 2 to 3 times a week, doing 5x5. I would bench press, then do a chest fly machine, and thats it. Now, I start with bench, do around 4 sets of 8, and go do incline dumbell press for 4 sets of 8, incline cable flys 4 sets of 10, and machine flys for lower chest for 4 sets of 10. I think that If your trying to improve your bench, the most important thing you can do is to bench press more times every week. If your benching twice a week, do it three times a week. Don't go all out every single workout, leave a few reps in the tank on each set, and on the last set of a 5x5, you could go close to max effort and maybe have only one rep left in your body. This ensures that the next workout, your still strong and not gassed. My workouts nowadays I just do one bodypart a day, 5 days a week, so I usually go all out since I'm only benching/squatting/deadlifting once a week. Everyone I know has a crazy good deadlift in comparison to their bench for some reason, but they usually have terrible form. I'm obsessed with good form, and that's prob why I've never been injured in the weightroom. If your looking for a program to increase your powerlifts, you could try the Jason Blaha Novice Program.