To be honest, FoW doesn't do anything for hitting positionals. The movement speed increase is so minimal that it's meaningless. Additionally when playing MNK you never wanna be like in the middle of the butt or flanks, you wanna be near the border for where flank becomes rear so you can just tap a or d to move to each.
Also I feel like there's some confusion with Anatman. It will not generate GL stacks unless you have hit the boss, therefore using it pre-pull would yield no benefit except that you've now screwed yourself out of a GL stack unless you wait on the CD. If it could be used prepull MNK would become the single most broken job in the game as you'd just go to GL4 before the pull and be starting the fight with 40% more damage and 20% haste and if that was the case everyone would love Anatman. The tick tracking is still viable depending on how things math out, my personal theory is that because Anatman is now a GCD it's worth it to do Shoulder Tackle > Anatman (using the tracker to get an instant tick) then holding it for a 2nd proc since you'd only clip your Coeurl form move by .6 seconds at most (we'll round up and say 1 second). Currently it's still a DPS gain to do Demo > Anatman > DK even if Anatman takes an entire server tick to proc. Considering you'd already done Demo your GCD has probably already cycled close to 1 second before you press Anatman meaning you may clip DK by around 1.5 seconds. The difference is that now we'd get GL3 out of clipping a GCD instead of just GL2. Though this also depends on raid buff alignment since clipping delays us and Anatman on the GCD is already pushing us back an entire GCD in our opener, so we'll just have to see how the rDPS averages out between solo anatman tick and dual tick.
Edit: I say "use anatman" as in it is actually benefiting us in some way, not that it is unclickable.