I meant if the chart throws up RTOW equal to MTOW then one engine performance is also considered as a part of the calculation.
Both AEO and OEI performance is considered for EVERY takeoff. Whichever of the various calculations gives the least TOW for the day becomes the limiting case.
You can't read anything regarding this process into whether the RTOW is equal to, or less than, the MTOW.
It will be able to take off and meet gradient requirements.
This will apply ALL the time, regardless of which limit results in the particular RTOW.