Masse cues are like Jump cues and Break cues. Are specialised, and you need to know what it is about a particular cue that you like. Then you can get one made to suite you.
In reality, if someone already makes a Masse cue that you like, buy that one until you know what you really want in a Masse cue. Otherwise you are wasting every one's time and money.
There will be carbon Masse cues soon too, just to mess with what you may or may not like. A masse cue does not have to have a high tip endmass to be effective either.
Short and stiff shafts, mine are 24" hornbeam, .300" LBM capped ferrule, stiff taper.
24" butt, normal dimensions, but cored with Jatoba, so very stiff and a bit heavier than a normal playing cue. 3/8-10 Modified brass pin.