Bomberman can certainly take different forms, but if you're going to go the more control, less beatdown route, I suggest starting with Dan Cunningham's list:
http://www.themanadrain.com/index.php?topic=32968.0The maindeck is really solid, and UW really takes care of most of the metagame now that Aven Mindcensor is available.
Regarding what you've posted, a few thoughts:
-This deck is mana hungry, if you're going to run a counter you pay mana for, make it mana drain not mana leak.
-The black splash is certainly defensible, but if you're going to bother, go all the way. Make room for confidants (and maybe cutpurses), change mana leaks to daze, and go fish-style.
-I have no idea what you're going for with ancestral knowledge, I'd up the merchant scroll count instead.
-It's a tough balance between trinket mage targets and making room for other stuff. I stuck with a.spellbomb, t.crypt, sensei, and e.explosives. It gives you a answer to creatures, grave, permanents in general, and then something to get your draw engine going.
-Pyrite spellbomb IS win more. If you were running a red splash that would be one thing, but the deck can go infinite with jotun grunt, so you don't really need pyrite.
-MAKE ROOM FOR TIME WALK