I have serveral MT3s and they are really airy on my evic. I had to plug one of the holes in the coil base to get a tighter draw. But I'll tell you this, I have to pull the post out on the MT3 coil a little bit so it will work, otherwise it won't make contact with the center post on the evic.
You might want to try the Kanger EVOD. Its a bottom coil like the T3/MT3, but smaller and with less expensive replacement heads.
It has a smooth metal base with three air holes, rather than the knurled base of the T3/MT3. So its easy to tape over one or two of the air holes of the EVOD if you want a less airy draw. The EVOD fits the eVic without an adapter.
I always disliked the knurled base of the T3s and MT3s. I'll be buying EVODs instead from now on.