Yes, assuming the wave count is correct, the end of minuette wave (v) would be a good place to start to scale in to a long position.
There is one caveat however. It's possible for corrective waves to develop additional complexity. That is, it's possible that intermediate wave (2) will develop another leg once minor wave Y completes (see wxyxz patterns).
To account for additional complexity developing, it's important to always know the point where the trade is wrong and get out at that point. There are no guarantees in the market, just probabilities which may be slightly weighed in your favor ;)
I have re-read your last comment: "Given that minuette wave (iii) was greater than 1.618% of wave (i), I'm expecting that (iii) will be the longest wave in this move.". Did you mean minuette wave (ii) was greater than 1.618% of wave (i)?
No, the statement was accurate. Wave (ii) cannot be longer than wave (i) or it wouldn't be a valid wave (ii). That is, wave (ii) is not allowed to retrace more than the length of wave (i). If you ever see a count which suggests that, it's an inaccurate count as it would break a cardinal rule of EW.