I am really frustrated by my progress. Last 9 weeks, I maxed out on deads at 405. Now, my current estimated max is only 415. It's a really pathetic progress. Here's my typical Max Effort Deadlift session:
Work up to either a 1RM, 2RM, or 3RM on whatever lift that involves the posterior chain.
Leg exercise (whatever works.)
Note that I don't do any extra assistance work for my posterior chain. Is that the problem??? I'm afraid to overtrain.