Can confirm it is.

Would require some testing to make sure, but since it only targets 9 in total if the buff is full random then there should be a 25% chance that he will not get a buff

Do note that with 2 the chance is should be 6.25% and with three its 1.56%

Auto Barrier effect all teams on that side as a general rule. Barrier mysteries effect only your team.

Its gets extra complicated when you reach the multiple hiruzen case, and where in buff order he is in, + for the multi case% is under assumption that buffed units are completely random. Under 1 hiruzen the odds are 66.66% for max clones or 59% he doesn't get it he buffs first of his grouping and goes last. Just a quick list of odds based on buff order since the final result for multi hiruzen is the multiplication of the set cases, with these being that one particular hiruzen is not buffed since it more than quick math for the case of max clones no hiruzen buffed, for 12 man 3 hiruzen the odds are .00685% or 1 in 14606.3.

1st group 1 cast= 25%

1st group last cast= 47.06% = 2cd group 1st cast

2cd group last cast= 59.1% = 3rde group 1st cast

3rd group last cast = 66.66%

So % chance of a specific unit not getting the buff with full clone team with hiruzen going first is 6.95% and with hiruzen going last its 18.54%
also as a note the 100 - the percent listed is the chance that the unit will get the buff

Its gets extra complicated when you reach the multiple hiruzen case, and where in buff order he is in, + for the multi case% is under assumption that buffed units are completely random. Under 1 hiruzen the odds are 66.66% for max clones or 59% he does get the buffs first of his grouping and goes last on their side. Just a quick list of odds based on buff order since the final result for multi hiruzen is the multiplication of the set cases, with these being that one particular hiruzen is not buffed since it more than quick math for the case of max clones no hiruzen buffed, for 12 man 3 hiruzen the odds are .00685% or 1 in 14606.3.

1st group 1 cast= 25%

1st group last cast= 47.06% = 2cd group 1st cast

2cd group last cast= 59.1% = 3rde group 1st cast

3rd group last cast = 66.66%

So % chance of a specific unit not getting the buff with full clone team with hiruzen going first is 6.95% and with hiruzen going last its 18.54%
also as a note the 100 - the percent listed is the chance that the unit will get the buff