Remember indoraptor is a unique. When talking about counters, it is usually assumed at same level. For example, monomimus at same level kills indoraptor exactly in two hits, 1 level lower monomimus must rely on dodges to kill indo.
It’s the same story for stegodeus, Stegodeus can counter indo because it can survive two attacks from indo, but if stegodeus is a few levels lower, it cannot do that. In head to head match ups, you should go rampage first, indo usually evasive. On second turn you should go short defense because indo goes first and will DSR you, you put up your shield because on next turn indo doesn’t have a shattering attack. On turn 3 you go thago, then T4 rampage again. As long as the first rampage went through evasive or the second and third attack went through, you will win, which is 62.5% chance at same level (At same level stegodeus will survive two crits from indo: a DSR and a shielded CI).
With suchotator you should bleed first, then SS, finally NI. If indo doesn’t crit, you will either die with indo or kill indo on T3.