Lets face it bombs will always be viewed as support and not real damage weapons. With this set however all your bombs will deal much more damage, plus you will have a very nice defenses. This set is not intended for haze bombs or vortex bombs as much as other bombs such as Blast bombs (Nitro, BAB, ITD, DBB), Shard bombs, and Dark Retribution.
There are downsides though, you don't have any CTR perks on this armor, but thanks to the CTR Med from LVL 10 weapons plus the Bomb Focus Pet Perk you can still get up to VH damage and VH CTR on an untrinketed/non UVed set.
I would not recommend this set for newer player but rather those that have the right items, these include Maxed out Sprites, Bomb related Trinkets, CTR UVed bombs, and LVL 10 bombs.
With the right items this set can become a dangerous threat to enemies, there is one other problem though, most of the bombs that are most viable with this set come with knockback leaving you down to 2 party friendly bombs (and even then you may get complaints from the loss of vision your bombs create).
This set stacks up to be an excellent, defensive, pro gamer's, solo bombing set, if you actually prefer team support though you may want to grab volcanic demo as it can setup support bombs fast without too much investment.
Git gud and git mad bombah.
Jokes aside, all bomber sets are, simply put, terrible choices, even for a bomber.
Not because they're bad but rather because they're heavily outclassed by a lot of other, general, sets, except for maybe the volcanic demo set.
Bombastic, mad bomber, hell even kat hiss set would all need a nice buff aswell as an option to deactivate/reduce the visual effects of bombs so you won't bother your party mates as much, but I guess we'll never see this cos bombers get no love.
Mercurial Demo would be really nice if it wasn't for the fact that Black Kat set is way better and also gives shadow defense, and everyone knows how much shadow is the most prevalent damage type in T3, so even there there's no real point in using it save maybe for when you're going to fight shock constructs.