Full Chromalisk;
Starts at three star, easy crafting.
Immediately good at the Jelly palace T2 levels.
Takes on volcanic attributes at only 4 star, in the salamander line, for early vannaduke farming.
Turns into Arcane salamander, a great peice of gear if coupled with shadow defense UV's;
Arcane salamander;
Gives bonuses to both monsters that inflict peircing, a inverse peircing defense.
In spite of the net medium damage bonus, the peice still has more elemental defense than volcanic gear.

Angelic and Drake mix;
Matches at 3 star.
Provides all four defenses, with a tad extra elemental and peircing for spike traps and blast boxes.
Gives damage bonuses to both enemies that are weak to peircing, so you can exceed with flourishes or stay well rounded with shadow and elemental.
Very well rounded with the Omega Shell.
Useful in PVP if angelic is made into fallen.
Fallen and Dragon mix;
The fallen makes up for the unused beast bonus on the Dragon with low ASI for guns and swords.
Matches of course.

Full Mad Bomber;
Completely stacked toward bombs.
All of the power is put into attacking, since you always have to deal damage but never have to take it.

Mercrucial demo;
Gives out the two bonuses that cannot be obtained through UV's; movement speed increase and general damage bonus.
Full shock, very useful for PVP.
Looks like a blasted knightbot.

Demo and Wolver mix;
Matches at 1 and 4 star, plus potentialy 5 star.
Lots of normal defense, so you don't have to worry about the gate type.
Some peircing and elemental, for spike traps and blast boxes.
Differing weapon bonuses, so the ball is in your court.

Full Sklover;
Good peircing and normal defense, the two pure-damage sword types.
Full freeze, also useful in PVP. Plus, swordsmen don't want to be frozen, since allies rely on them to chop the ice off of people.
Stacks well with the striker pack.