Nvm, the mod partially works, I forgot about the signed apk issue. It works with other log in. I don't think the high health option works (units still get damaged) but the high damage definitely works (Thank you for this!).
To get passed most stages, try using the following heroes if you have them, Typhon (when his shield bursts, it should kill all enemies), and then have Morrigan in the team and a mage or fighter at the backline (So that Morrigan's passive takes effect, and the mage/fighter doesn't get killed immediately)
I'd also recommend against using this in other modes that have high visibility such as but not limited to Guild War, Coliseum, Wardragon, Troves, especially the upcoming event Crusade to avoid bans.