DRG is unbalanced and desperately needs a buff.

[Altena]

For example, according to ffxivdb.com, the Allagan Cuirass of Striking has:

+29 Strength, +33 Vitality, +24 Accuracy and +34 Crit Hit Rate.

Striking is for MNK.
Maiming is for DRG.

Relic body is far superior to Allagan body.

The actual stats for Allagan body are:
Strength 29
Vitality 33
Determination 17
Skill Speed 34

The stats for relic body are:
Strength 29
Vitality 33
Critical Hit Rate 24
Determination 24

While the Darklight Cuirass has:

+20 Strength, +22 Vitality, +18 Determination and +19 Skill Speed.

You cannot compare an iLvl 70 to an iLvl 90 body piece.

As an alternative (even though it's not a cheap one), I would suggest to try and get a HQ'd Darksteel Haubergeon. It has:

+20 Strenght, +22 Vitality, +19 Skill Speed, +27 Crit Hit Rate and Materia Slots in which you can meld (for instance) Accuracy Materia.

DS Hauby is a downgrade from iLvl 90, just based on STR alone.
Once again - Relic body is far superior.

If that suggestion would be over the top, then I would personally go for the Dragoon Myth Gear.

But, that's just a suggestion.

Dragoon relic body is BiS.

Plllleassssse know what you are talking about, before giving advice.
Also my Lodestone profile has been linked in a previous post.