Actually, the Tranquility can add nearly 33% gun damage bonus (.17% X 190 capacity), which may be overall better than just boosting splash, even by a bigger percentage.
Of course, that depends on how that moneyshot damage is calculated.
If it’s independent damage, I can see merit to the bomber kit.
Of course, but increased crits ALSO mean a faster kill
My initial comment about the shield bypass luneshine was more of a general one. Usually you get 30%, so to me it’s clear that the crit is better, since at 30% you will almost always have to deplete the shield completely anyway.
At 60%, it’s more debatable, but on bigger targets like a boss, the laws of average will make you deplete the shield completely almost every time, since they usually have lower shield value than health.
Don’t forget that the crit luneshine also benefits from OFEOY: not only that 10% becomes 20%, but the inherent type A bonus in Jakobs pistols is effectively doubled too, bringing the 20% to an effective 30%… that is pretty sizable.