You mentioned grip is your weak point on dead lifts...
And lucky for you that is something you can fix in rather quick fashion.
One day do:
4 sets of BB static holds (double over grip)
Basically load up the bar on a rack, chalk up... and pick the bar up and hold it until your grip fails.. time should be between 10-30 seconds. Do it 4 times.
Then later in the week do:
4 sets of plate pinches
basically using old fashion iron weights you put the smooth sides together, then you grip them and hold them as long as you can... if you can hold them longer then 30 seconds you need to use bigger plates or slide another plate in the middle.
or you could use Grippers.. (those things you squeeze in your hand).. they come in 100, 150, 200, 250, and 300 pound tensions... again do 4 sets, of which ever one you can squeeze for at least 10-30 seconds.
you do that ****, and you will very quickly see an improvement. plus it will toughen up your hands... I'm assuming you don't wear gloves cause if you do... loose them.
ANd bump on the wrist wraps.. get 24" wraps. they will save your wrists and add stability to your bench.
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and Big Casino thanks for mentioning me as a powerlifter.. That was flattering.. lol. But I have lot to learn.
But I'm damn close to a 600 pound dead lift soon.