MA Tien Chi in 3.10

[FedSlayer]

So much to learn that a lot of this is over my head. On magic duel each of the involved duelers adds 1d6 (not open ended) to his/her level of Astral Magic. So an S1 would have a 10/36 chance to defeat an S3?

On a roll of 6 the S1 would kill an S3 rolling a 1 thru 4
On a roll of 5 the S1 would kill an S3 rolling a 1 thru 3
On a roll of 4 the S1 would kill an S3 rolling a 1 thru 2
On a roll of 3 the S1 would kill an S3 rolling a 1
On rolls of 1 or 2 the S1 can't kill the S3

Due to ties killing both mages there is a 30/36 chance of the S1 being killed, or a 6/36 of the S1 surviving if you want to think of it that way.

Correct?

Given enough expendable lower level astral mages you can take out an astral mage 1-2 levels higher, but it will be expensive.