I do conventional deadlifts on back day and romanian deadlifts on leg day.
Personally, I pull very similar to Konstantin Konstantinov who was mentioned earlier (similar in everything except the weight lol), though this is the way I was taught. Is it incorrect?
As for when I do deadlifts, I give them a day of their own. I have done squats and DL together, but that was only when preparing for a contest. Usually I am spent by the time I am finished with one or the other.
Good spot. Yes, I did make a mistake in my explanation.
What I should have said was: the hips should NOT elevate before the shoulders.
The hips and knees should extend at the same time, not: knees extend (hips raise) then hips extend (shoulders raise) as I see many people doing at local gyms.
So, hips and knees should extend simultaneously: thus hips and shoulders elevate equally through the first part of the pull.
I usually do them twice a week. Once on back day with heavy weight and again on hamstrings day with slightly lower weight, usually SLDL.