I rather use Mercon-V over Maxlife any day. And, if shift quality isn't as good as expected, dose the lubegard HFM or Platinum.
And, around here during the winter, even the MV blends are nothing to brag about when compared to Mobil1 and Redline.
Castrols MV is their ATF+3/ATF+4 fluid. I'd wager that any ATF+4 would work fine in place of T-IV.