Send an email to the game company with something like that:
Dear Netgayble,
I am using modded apk on Seven Deadly Sins Idle and I found out the mod is not working on certain game modes , like "Gold & Hero EXP Dungeon" and "Tower of Trials." It also doesn't work on the "Final Boss Summon Available" or "Lab Sample Dungeon".
Could you remove battle server checks on those game modes so that the battle calculation is not done on your god damn game server on forcefully determining the result of battle. Because this game supposed to be played with skills, not just viewing the 100% predetermined results returned from your game server.
We want to use mod apk, please consider that okay, love you very much hehe.
Kind and Lovely Regards <3