Neat deck, I like the idea.
Okay first off, you have 12 three drops and only which could be clunky because they could be vying for the same space. I would probably drop the
tumble magnet 
s in favor of
goldmeadow harrier 
, which equals more creatures and is essentially 4 more
gideon's lawkeeper 
s. This will provide a more stable turn 1 control to set up your
gideon's avenger 
. And I like the
grand abolisher 
he provides a good source to hose control decks and prevent combat tricks unless they are yours
You should only need 2 or 3
Days 
since you should only need it's effect once a game especially with the
swords to plowshares 
and
oblivion ring 
s that you are also running! Something that I would like is
faith's shield 
as a way to protect
gideon's avenger because although he can become quite powerful in this deck, he is extremely vulnerable to removal. Plus
faith's shield can also be used to protect
Gideon 
himself in place of
holy day 
or as a way to swing through unblocked with your pumped
avenger . Multiple uses, one card, gotta love it! Also as good as a card that
angelic destiny 
is, it really does't fit this deck that well. I would remove it to give room for
faith's shield and the like.
Also I know that you are probably thinking of using the
sun titan 
as a way of recursion for your creatures after you drop a
day of judgment which is good but another option may be a
sunblast angel 
, this could be like a one-sided
DoJ !
This is just food for thought, hope is helps!
