Since you want fire blast, I'd give Aggron a Brave (-Spd, +Att) personality and EVs of:
HP: 252
Attack: 58
Def: 0
Speed: 0
SA: 0
SD: 200
so far all i got is:
aggron
nature: sassy (+SD, -speed)
151/252/0/0/0/159
quake
d-edge
fireblast
irondefense
was wondering if i should do any altercations to his personality & EVs
Since you want fire blast, I'd give Aggron a Brave (-Spd, +Att) personality and EVs of:
HP: 252
Attack: 58
Def: 0
Speed: 0
SA: 0
SD: 200
Dignity (n): the time elapsed between passing an attractive girl and turning around for another look.
I'd give Aggron a Hasty (-DEF, +SPD) Personality. It uses some of Aggron's still incredible defense to give it an edge over other members of the Tank devision by being able to go first, and possibly use moves that could cause flinching.
MAKE SURE that you Aggron has Rock Head!!