What are the short Versions of Dimension Master

[Blizzardooo]

Hi i'm editing my admin panel, cuz it's only for 99 servers. I need to put Dimension Master and all of the three phases of the hero, but i don't know the short term:

"Dark Knight" is "dk"
"Blade Master" is "bm"
"Grand Master" is "gm"

What is the short term of this:
"Dimension Master" is ?
"Bloody Summoner" is ?
I don't recall the third phase? is ?

[MentaL]

[duracel]

Really that hard to get the 1st letter of the words and put them together?
1.summoner Summ
2.bloody summoner BS
3.dimension master DM