Even better rule...don't try to go around on one engine. Put it on a
taxiway, on the grass, whatever, but don't try to go around on one. IMHO it
is bad training practice to even suggest to a MEL student that waving off is
a practical alternative.

Given the brutally minimal training most multiengine students get these
days, you may well be right for most cases. A single engine go-around
is most certainly within the capability of even the most minimally
powered twins under some circumstances (none can do it under all
circumstances) and with proper pilot technique, but the scope of the
typical multi rating course allows for neither the flight training to
properly teach and reinforce the pilot technique nor the indepth
analysis of options that would allow the pilot to competently decide
when a single engine go-around can or should be done, and how to tailor
his operating procedures to keep that option open. I suppose it is for
this reason that it is not part of the private or commercial multi
syllabus.

For someone who is going to actually fly a twin on a regular basis, I
think the suggestion that a single engine go-around and missed approach
should not be taught (or even discussed) is basically irresponsible.
It's a procedure that may one day become necessary. Suppose you reach
the bottom end of a non-precision approach without breaking out, push
the throttles forward to level off, and one engine won't come up (or
flat-out dies). Now what? I had to demonstrate exactly that scenario
on my ATP ride, which requires (in the PTS) both a failure inside the
marker and a single engine missed approach.

I was trained in the procedure prior to my private multi checkride, but
(a) I was not getting a 10-hour multi course that gives you an FAA
rating but won't get you insurance in any twin, anywhere and (b) I was
trained by a 12,000+ hour airline training captain, not an MEI trying
to rack up his 100 multi for the airlines.

My experience is that the average multiengine student these days is an
airline wannabe. He will accumulate only about 100-200 hours of multi
time before he goes to the commuters, where they WILL teach him to do
single engine go-arounds and missed approaches. He will accumulate
those hours sporadically, and in the training environment. He has
neither the exposure to justify the training that would make him
proficient in single engine go-arounds and missed approaches, nor the
opportunity to keep that training current, and in this situation your
advice is good since the situation I described will almost certainly
not happen to him, and if it did he wouldn't have much chance of
pulling it out anyway.

However, if what you're dealing with is someone who flies a twin
because he flies so much night/IFR/hostile terrain/overwater that he's
not comfortable with the risks of doing all that flying single engine,
then your advice is downright dangerous. The RIGHT advice for someone
who is actually going to fly a twin on a regular basis is to get proper
training in how to make a competent single engine go-around, from
someone who knows how - and that includes the training necessary to
understand when it can and can't be done.

Michael