frost bomb or living bomb
I prefer Frost Bomb since it's sure to proc, thus I can plan accordingly (I also hate the whole "lolwannabewarlock" feel of the other bombs but that is for another time). I'm no expert though, but like I said : if you want to be able to control your burst, take FB. If you rather try your luck at a bigger, but unreliable (and a perhaps pain) to manage burst, LB is your choice.
Someone hasn't had their mana biscuits this morning. I'm not sure on PvE, I'd refer to Ruther's website. For PvP, frostbomb guarantees you a frostfire bomb on detonation or when the target dies. With living bomb, it's all random... you may get 1, or you may get none. You may also get upwards of 4; depends on how gracious the RNG Gods are feeling.
This is why Fire Mages such as myself get very happy when Frost Mages use Frost Bomb. I know exactly when to spellsteal Brain Freeze to use for a Pyro proc.
But, as you pile on more Haste, Frost Bomb begins to slightly pull ahead, because it doesn't allow proc munching. LB ticks slow so it rarely runs into this problem as well.
Pvp wise use living bomb, easier to get off, if it's dispelled it's not as catastrophic as frost bomb being dispelled, and it ends up being more damage overall.
Please report any Code of Conduct violations, including:
Threats of violence. We take these seriously and will alert the proper authorities.
Posts containing personal information about other players. This includes physical addresses, e-mail addresses, phone numbers, and inappropriate photos and/or videos.
Harassing or discriminatory language. This will not be tolerated.