Well i'm not saying that i wont use Bootshine and i'll use ID instead, infact i always put my ID after Bootshine.Regardless, a critical hit from ID is not guaranteed. And without an ID crit, ID won't pull significantly ahead of a standard MNK rotation. A Bootshine crit will always do more than an ID non-crit, and a Bootshine crit is guaranteed.
Impulse Drive is not useless, but it is very risky. Between crit chance, the possibility of missing the rear attack bonus (hate shift, mob moving), and working in other MNK skills on the fly, you are walking a tightrope - and there's no significant payoff for success.
I understand that without ID i will arrive faster at the next BS dealing more damage (supposing that ID won't crit) but since i don't loose that much dps eaven if it doesn't crit i think that is worth to use it.
Yes those are all goods skills wich i'll get, but anyway right now i'm thinking about boss fights, u will use MS only every 90 seconds and only when the boss is below 20%.I personally use Invigorate, Bloodbath, Blood for Blood and the DEF+20% MRD skill. I also have Mercy Stroke, which would be a nice way to conclude an encounter if I ever remembered to use it; Impulse Drive would also work here, but MS is 200 potency and doesn't need to go up the rear.
I'm not saying that it isn't good, but since it doesn't eaven share the gcd is just a skill to use when is not on cd and it doesn't change your rotation.