Use it mostly for poking. Get yourself in close, and use it wherever you're at no more than like -5 disadvantage (meaning nothing that's not i15 or better will stop you (i14 if you start from crouch).
Some common setups:
- Off a hit 2K, you are only -2, so really nothing (outside of maybe Yoshi's A+K?) will interrupt an iMCF, since it would have to be i11 even to clash (2+9)
- Off a blocked 22_88K, you are at 0, and yes, even though it looks like you're out of range, you will connect with an iMCF if they try anything.
- Off a blocked iMCF you are at -3. In other words, this means that even if you're just using it as a poke and they block it (it can be blocked standing or crouching), go ahead and throw out another one from FC. After about the third one you're out of range, though, so it's not an infinite pressure string.
- Also, off a regular hit iMCF, you are at +6, so while nothing's guaranteed, go ahead and follow up with another iMCF. Worst case scenario leaves you at -3 after the second one.
- After a blocked DGF B, you are at -5, so it's still pretty safe to fish for a CH with an iMCF afterwards, especially since it tech-crouches.
The whole point of setting this up is for the CH, which leads to big damage.
Sample followups (assume a CH iMCF before all of these):
-- my favourite: 66B, DNK, 2K. Input the 66B literally as soon as you see the CH connect; you cannot wait very long or it will miss. In fact, despite the fact that you could technically interrupt 66B after blocking the iMCF with anything i20 or better, you may get some mileage out of just going ahead with the 66B anyway. A lot of people will try to use a big launcher afterward, and if the 66B lands as CH you get the full stun combo. But again, use caution.
-- if you have meter: 66aA+B+K, bA or 66aA+B+K, iMCF...
-- RCC 3B, a:B+K, deathcopter. If you have them close to the wall you can substitute DNK for the deathcopter for the RO.
-- of course, CE.
BTW, the threat of iMCF is what makes 22_88K so fun, despite its slow speed and high hitbox. If it hits, guaranteed CE or high-damage launch combo. If they block, you can frame trap with iMCF for the same result. []