honestly, if you're a skilled player then it wont really matter what you gem for.
axe spec - arp gemming
sword spec - arp gemming is better than str gemming
mace spec - str gemming since with 2pc t9 bonus you are basically at the arp cap with a trinket proc.
as for me, i run mace spec to get me to the arp softcap for my trinket, and gem full str to boost my ap.
i think i only have 1 yellow socket in my pvp gear and its in my boots, where i put in a 10str/10hit to reach the hit cap. everything else is either 20 str or 10str/15stam. and a nightmare tear in my relentless mace.