No, no- 'debuffs' only affect the opposing team. (unless otherwise stated) Like, Thaddius Brood- the -1 Magic Attack and -1 Health only affect the opposing team.
The -1 Armor (and Health) really help out the "Blast" havers o your team- taking away that pesky armor that might soak some of your Blast damage otherwise.
RE: A Call to Arms: Tip of the Scales