My DM is using this homebrew version of True Strike - too powerful?

[Yakk]

3.5 replacements:

1. Do not scale number of d4s.

1b. Instead add 1d6 damage per tier.

2. Take the best of the d4s, not the sum.

3. Revert to baseline. Then add 1d12 damage per tier to the true stike attack.

I go with 3. 1b is a modification on 1, the rest are independent suggestions.