Tim. that wall girt at the same level as the tie beam, has always been a puzzle. The way I see it ,you need not to have much thrust on that post or have a very beefy post to take that connection.
In this kind of design you have sill plates and then the top plates holding the frame together with the help of braces and good sheathing, not to mention the other longitudinal joining timbers like purlin plates and tying joists.
My solution is to join that girt the same as the joist with shoulder for bearing(1.25") and diagonally screw it to the post. I really dont see any structural advantage of cutting deep mortises and pegging this "joist" at a point where you really dont want to weaken the post. I would rather do a tying joists to the tie beams.
What did you mean"Better than 3/4" pockets"?
What other solutions do you like to use?
thanks for reply. tb