Two things. First, my math could be wrong here, feel free to correct me. Second, I'm leaving staff of striking out of the mix due to it's limited charges (and I'm not really into recharging through merchants).
I know that the Staff of the Ram is the end game goal, but until that point, cleric/thieves (and, in my case, Stalker/Clerics) need to use other gear. For SoA, I've read that the Staff of Ryn is the way to go, but I'm wondering if that is really the case. I'm talking about Blackblood. Consider that there is only 1 point difference in their base damage (that which can be multiplied by the backstab). However, the black blood also throws in 3 points of acid damage. So, until a backstab multiplier reaches x4 or greater, they are actually pretty comparable. Even after that point you're only losing on (backstab multiplier - 3) points of damage. Meanwhile, in regular combat, the Blackblood outdoes the Staff of Rynn in raw damage (not to mention you have a shield with it and kill trolls).
(I think) The only thing left to take into consideration is crits. With 2H weapon style, you will crit more than you would with blackblood and shield (but the same amount with Blackblood and single weapon style).
If you could only take one melee for a cleric/thief (or stalker/cleric), is Blackblood your best bet for blunts in SoA?
(Also, say "blackblood your best bet for blunts" 5 times fast if you can)