Nefarian spare parts keeps giving me divine shield

I have the Spare part equipment selected yet when i attack the summoned dragon comes out with divine shield. Since I want to die to heal my dragons this destroys the whole setup. It seem to work on normal bounties but not in boss rush. Has anyone encounter this ? I cant get it to work whatever i do.

Are you sure?

There are different screens where you can choose equipment for mercs – the general roster screen, and the team screen(s) for each team the merc is a member of.

It is possible to have different equipment selected on each screen. The team screen for the current active merc team takes priority.

Maybe you have Spare Parts equipped on the general roster screen, but Experimental Subjects is equipped on the team screen?

No i thought so to,
so i went in changed and changed back over and over again to be sure. I changed it to the one i want on both screen even deleted the whole team and made it again, to make sure it was the right equipment.
it keeps giving me divine shield and health so i have both ( witch is pretty nice but not for this setup) I need the dragon to die so i can get health for the boss rush i was doing.