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Twin-Linked
Two Seperate
I'm curious as to what people think about either a twinlinked gun or two seperate ones of the same kind.
I prefer two seperate because it is more shots thus more potential damage.
The most obvious case is the assault cannon. 4 shots that can re-roll or 8 shots total? Do the math.
Plus, I don't want to see two seperate twin linked guns (i.e. Land Raider). That isn't what I am after.
I like twin linked, especially if you get bad first rolls. Also if you're talking sponson guns 2 twin linked las cannons works wonders.
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Um.. having two seperate guns are always better than one twin-linked.
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way i see it is, what happens if u miss ur first shot? u get a second roll...
ok so now look at 2 seperate shots, still a second chance to hit, but also a chance to hit twice.
its like having the reroll there but allowing you to hit on the first one as well as the second.
lets agree to respect each others views, no matter how wrong yours are
I like the universal rule of 40k shooting, wisdom passed down to me from a sage orc player. More dakka is always better!
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The only place to prefer a Twin-linked weapon over two weapons of that kind is on a tank. If you move over 6" you may only fire one main weapon, and the twin-linked weapon counts as one. Take a Predator Annihilator for example, if you had to choose to remove either the turret lascannon or both the sponson cannons I would remove the sponson cannons.
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Two distinct guns are, yes, better than a twin-linked gun. You roll more dice... this is good. However, twin-linked weapons generally cost 1.5 times the original cost of the gun, while two separate guns cost 2 times the original (except for Tyranids.) You'll need to crunch the numbers to decide which is better in any particular case. Or I could be bored and do it for you.
Suppose that our base gun has N shots, costs C, and that our ballistic skill is such that our probability to hit is P. So if we have two distinct guns, we have 2N shots, hitting with probability P, and at a cost of 2C. A twin-linked gun has N shots, hitting with probability 1-Q^2 (Where Q=1-P,) at a cost of 1.5C.
I wish to find the probability P where the expected number of successful hits are equal for both the twin-linked gun and the two distinct guns, after taking cost into account.
Two distinct guns will expect 2NP successful hits. A twin-linked gun will expect N(1-Q^2) successful hits. We may purchase 4 twin-linked guns for the same price as 3 sets of two distinct guns (6 guns total.) The relevent equations follow:
3*2NP = 4*N(1-Q^2)
1.5*NP = N(1-Q^2)
1.5*P = 1 - Q^2 = 1 - (1-P)^2 = 1 - 1 +2P - P^2 = 2P - P^2
1.5*P = 2P - P^2
1.5 = 2 - P
P = 2 - 1.5
P = .5
At a ballistics skill of 3, in terms of expected values, you're just as good either way. Two distinct guns will give you a potential of getting more shots, while a twin-linked gun will give you more reliability.
Replacing the equality with an inequality (which is safe since P is positive) we see that if P < .5 (BS=1 or 2), then the twin-linked gun gives you a better expected number of hits. This may explain (partially) why twin-linked guns are more expensive for Tyranids... although the adjustment is too much. With P > .5 (BS=4 or higher,) two distinct guns give you more expected hits.
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Edit:
Viktor makes a good point about tanks. If you take restrictions on shooting into account, twin-linked can be better. Having two guns isn't going to do you any good if you can only shoot one.
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Yeah, I would say that more static tanks should like individual weapons best and that tanks that move a lot would probably like twin-linked best. Unless of course the moving tank had all defensive weapons or non-twin-linked ones. (Predator Destructor with HB anyone?)
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firstly, i'd like to say that i like 2 seperate weapons.
nowWOW. talk about warhammer maths. actually quite interesting reading Bob Dole's mathematical equations, well done.3*2NP = 4*N(1-Q^2)
1.5*NP = N(1-Q^2)
1.5*P = 1 - Q^2 = 1 - (1-P)^2 = 1 - 1 +2P - P^2 = 2P - P^2
1.5*P = 2P - P^2
1.5 = 2 - P
P = 2 - 1.5
P = .5
i like 2 seperate weapons because regardless of what the theory says, i still prefer the psychological benefit of thinking i have 2 weapons and more shots than just one weapon with re-roll.:yes:
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