Not bad if you take enough bombs and create walls with them. I have managed to catch a good number of eldar cruiser in stasis bomb screens that either force them into me or to sit still long enough to line up a nasty torp barrage.
Then that Eldar is an idiot who just groups his ships together because he cannot micro them. Because as of right now, an Eldar who knows how to play won't even get caught out like that, he will either torpedo, bomb/storm spamming, kiting you with bomber or just pulsar you to death while not even being seen. With Vaal's maneuver and speed boost, a good Eldar will manage to never get caught in a bomb blast.
Well yeah...the best eldar players are just overpowered. They have too much reward to risk plus GL actually taking out their engines even with them not having shields. Bombs work against the average player but against great eldar it seems you have to hope they mess up or you have 0 chance. Don't even get me started on how broken eldar are on objective based matches.
Well, that's why I said it's pointless to take bombs with you when facing against Eldar. You'd have better chance with taunt and detection skill.
The only thing that gives you a chance against Eldar is taunt and that is hard to work with. 12k Pulsar beams will mess up anyones day!
Bombs can still be used as an area denile tactic. Like in planetary assault on defence they work great no matter who you fight. I managed to pretty much insta gib an eldar battle cruiser the other day with an ork battle ship. I set its upgrades to fast turn, extra accuracy, extra range and all 3 kustom points wen into mega kanons. Used one lock on when he got close. It was glorius.
You should replace that Extra Accuracy with Armor piercing, the bonus is really lackluster for 1 upgrade slot, and it only applies at range beyond 6k anyway.