I'm not much of a theorycrafter, but of course I try to take traits and abilities that make sense for what I'm trying to do. So far, my favorite weapon set is pistol and shield, even in it's bugged state, as I like being able to reflect projectiles and immunity/stun melees when needed, but I'm thinking about switching to rifle for jump shot. In any case, I'm one of those crazies running around dropping bombs. I admit that they are not so useful in WvW, except for running away, and I plan on spending a lot of time there, so I'll probably be making more use of the grenade kit in the future. For now, I'm playing with the idea of running both kits. Here's what my build might look like...
http://gw2skills.net/editor/en/?fcA...HIF6VeJqQl95hc1WQIA;ToAA1Cqo2yslYL7WutkbNKYiA
I prefer to go power all the way and understand that precision is probably better for most grenading, but I still think power is going to be winning with the grenadier ability. I'm putting down 10 in inventions and alchemy for 10% speed in combat, and instant regen, eilxer B, and eilxer S when I'm taking damage.
The bomb kit is mostly for big ol' bomb, and sometimes to run away still doing dmg to pursuit, but I've wanted to get more use out of it offensively. I'm thinking jump shot might help me do this, hence why I'd put down my sheild for a shotgun. In small confrontations, one on ones, or assaulting siege weapons, I'm considering how effective it might be to jump shot on a target, drop big ol' bomb, and slick shoe away,... or finish the poor bastard at close range with blunderbuss and bombs. The initial shock from jumpshot might be enough to confuse people about what my intentions are so they ignore BOB, and try to retaliate. In any case, slick shoes should plant the target on his ass long enough for BOB to trigger, and send him and anyone else around sprawling to the ground again on the knock back, and hurt badly.
Previously, while I was running pistol/shield, I'd drop BOB when overrun by melees, and immediately go into static shield to stun them. Believe it or not, this trick works, and melees will hit the shield before they recognize the bomb threat, only to stun themselves, and blow to the ground, while bombers take no damage, and run away. Of course, this doesn't work on other ranged, so it's not often applicable in WvW, especially when our side is on the offensive. I guess the only way to know which combo is better is to try shotgun/bombs out. If it doesn't work well, I might drop bomb kit during WvW. Sad.
The grenades pretty much only come out to feed the zerg. Especially zerg knocking on keep doors. Good to be hospitable.
By the way, this is strictly for WvW, and I'm not really concerned with sPvP here, where I would NEVER take grenades. Any thoughts?