Back when I had 130 wpf, 5ath, and steel pick, I had to feint against agility players since a swing right after a block wouldn't hit. Back then, the easiest way for me to get a hit on them was to move forward with an overhead, sometimes slightly held. The range bonus on the overhead can be deceiving, and it deals tons of damage when it hits. I still have problems with weapons that seem slow, then end up being faster than I think, and it happens the most when I fight polearms.
Against stabs, I just try to overhead after a block as quickly as possible (or hiltslash with a short weapon's sideswing). Sometimes, it feels like you release the block too quickly, but it'll still block (probably due to 30-60 ping delay). I always found it easier to do with shorter weapons like the steel pick since their overheads seem to hit so quickly.
Getting a little bit jealous about having 4 shield now. I want that knightly kite shield! Hoping for someone to dump a warhammer for cheap. I only have 670k right now, but I should be able to afford one in a few weeks.