It is an elite choice, which space wolves hardly ever use all 3 of. One is typically wolf guard, another scouts, or somehing like that. Not to mention the 4 fenrisian/cyber wolves they can take are always a great idea for points filler since you really arent losing an important model, however, the wolves cost nearly as much as a marine, so that is debatabe.
But 65 points in your elites? really, why
couldn't you find the points? It makes any vehicle have an extended threat range, repairs it, and adds 3 thunderhammer attacks the first round of combat almost always.
Another thing I notice is people putting mark of wulfen on thunderwolf calv instead of their grey hunters. Why do they do this? 50% of the time you get no benefit, and it hurts you, where in grey hunters it is always a beneficial upgrade.
my brain done hurted itself agains