Coordinates start at the bottom left corner, X , Y (Bottom left being 0,0 & top right being 7,5)
***EDIT***
Since apparently the format is too complicated, here's a grid to help.
0,5 | 1,5 | 2,5 | 3,5 | 4,5 | 5,5 | 6,5 | 7,5
0,4 | 1,4 | 2,4 | 3,4 | 4,4 | 5,4 | 6,4 | 7,4
0,3 | 1,3 | 2,3 | 3,3 | 4,3 | 5,3 | 6,3 | 7,3
0,2 | 1,2 | 2,2 | 3,2 | 4,2 | 5,2 | 6,2 | 7,2
0,1 | 1,1 | 2,1 | 3,1 | 4,1 | 5,1 | 6,1 | 7,1
0,0 | 1,0 | 2,0 | 3,0 | 4,0 | 5,0 | 6,0 | 7,0
If you're going to vote negative, please comment why so that I can improve my solution. Don't just do it because you don't know math and can't understand the simple grid concept.
***END EDIT***
Irollan:
Ranger 1:
Delete WALL at 4,5, then move BEAR from 4,2 to 2,0.
Delete PIXIE at 2,3, then move the two RANGERS into formation.
Ranger 2:
Delete RANGER at 3,4, then delete BEAR at 4,2.
Move ELK from 7,4 to 1,4, then move the PIXIES into formation.
Nelir 1:
Delete BEAR at 4,2, then move all the BEARS into formation - first behind the DRAGON, then behind the DEER.
Nelir 2:
Delete BEAR at 5,5, then move BEAR from 5,1 to 2,0
Delete RANGER at 2,2, then move the PIXIES into formation behind the TREANT.
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Griffin Empire:
Rolly 1:
Move SWORDSMAN from 6,3 to 3,2, then move SPEARMAN from 6,4 to 5,1.
Delete SPEARMAN at 4,2.
Move PRIESTESS from 3,2 to 2,4, then move the last two SPEARMEN into formation.
Rolly 2 (Requires Griffin):
Cancel ARCHER at 5,5, then cancel ARCHER at 2,4.
Move the SWORDSMEN into formation, then the ARCHERS.
Roderik 1:
Move SWORDSMAN from 1,0 to 3,1.
Move SPEARMAN from 6,1 to 1,0, then delete SWORDSMAN at 1,2.
Move SWORDSMAN from 6,2 to 4,0 then delete SPEARMAN at 4,2.
Move SPEARMAN from 4,3 to 6,2.
Roderik 2:
Move ARCHER from 4,1 to 3,2.
Move SWORDSMAN from 2,0 to 1,0, then delete ARCHER at 1,2.
Move SWORDSMAN from 4,2 to 7,0, then delete ARCHER from 5,2.
At this point, do whatever you want with your last move. I killed the angel, cause I didn't like the way she was looking at me. O_o
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Heresh:
Sir Reginald 1:
Delete ZOMBIE at 4,4.
Move EBON GUARD from 0,2 to 7,3.
Move ZOMBIES from 2,4 & 3,4 to 0,2 & 0,1.
Delete EBON GUARD from 0,3, then move EBON GUARD from 5,3 to 7,2.
Sir Reginald 2 (Requires Bone Dragon):
Delete ZOMBIE at 6,2.
Move ZOMBIE from 5,2 to 2,1.
Delete EBON GUARD at 2,3 then delete EBON GUARD at 1,2.
Move the last two EBON GUARDS into formation, then end your turn.
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Sheogh:
Dillon 1:
Move HELLHOUND from 7,2 to 3,2, then delete HELLHOUND at 4,4.
Move the two HORNED DEMONS into formation, then delete HELLHOUND at 7,3.
Move HELLHOUNDS into formation. It doesn't matter which two (there will be 4 available ones).
Dillon 2:
Delete HORNED DEMON at 5,3.
Delete HORNED DEMON at 0,2, then move HELLHOUND from 4,3 to 0,0.
Move NIGHTMARE from 0,0 to 4,2.
Move HORNED DEMONS into formation, then move IMPS into formation.
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There's your achievement! Hope this guide helps. If there are any corrections that need to be made, please post them and I will do it right away. Suggestions are also welcomed.