I would agree to some extent, but if you plan on wearing plate armor (true troll build) then I would want a few points in wm so that you still have some wpf after armor penalties.
this is true, a mediumish armor 27/12 build works great with stacked IF, with full plate you MIGHT want to get 3-4 WM, but with full plate you are a bit better off having more athletics anyways so.. just see what works for you
its just that maxed IF really completes the build, since everyone takes 5-10 hits to kill you and you 1-2 shot everyone else