The OEI procedure should have been designed to take into account the engine TOGA limitations.
Are you talking about a specific procedure, or are you speaking in general?
The danger with using the DEP procedure is that it is designed differently than a missed approach. The missed approach OEI procedure will set the DA based on the obstacles in the approach, and OEI performance. While an all engine missed, such with a standard approach procedure may have a 250 HAT, the procedure with an OEI missed may have a much higher DA.
Typically a DEP does not have a hold as part of the design, but a missed approach will likely have a place to hold. Getting to the hold pattern OEI is accounted for in that design.
Hopefully, that helps a bit.