So the new tank stance aggro mod (for PLD/WAR at least) is 10x.
Shield Lob and Tomahawk seem to have a 7x hate mod on top of that.
So in effect Shield Lob (hate wise) is equal to a 840 potency attack, which at this point (as I cant find any other attacks with the Increased Enmity effect on tanks besides the ranged pull) is the strongest single target hate builder.