If you'd rather use a Sickle than a Handaxe, I suppose that's your choice.
And what sort of twinking rules are we talking here? You're talking about Holy of PG weapons, which are sort of on the rare side -- I have them, but if we're talking strict no-twink PD play... somehow I get the feeling you'll be using whatever you have handy.
What I highlight is the important part. Your build is
almost entirely an end-game build. You may as well splash another Monk level and get Evasion too. Making it to the endgame, of course, is a different matter.
And while this may devolve to AC/Saves vs. HP, there really is no argument when it comes to
clerics who can
self-heal. Our survivability is entirely tied to our HP and our healing abilities. You're trying to maximize survivability on the high-end, which is an admirable goal, but I think inartful for the situation at hand: permadeath play.
The key, again, is from lvls 6-10 or so for a cleric. What is the survivability plan during those tough mid-levels --> that is the real question.
/gren