There are damage checks, if you do too much damage you can risk disconnections or even insta-ban in some cases, god mode is the only safe-sh thing but you still need to actually make a team that could potentially clear the stage, not just random units
since Special Interception is literally endgame, i would avoid using the mod there,
also, there are check in there, if you're way below cp and do certain damage you get banned,
the more you get into EndGame the more you have to avoid the mod
if you mean rank 1 in hard mode, then you can just look at the power of other people, in general it's hard to clear hard mode under power despite no debuff
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not doing damage at all, still gives better rewards than clearing Interception S