The following change:
Alter the skillchain properties of the Polearm weaponskill Double Thrust, so that Double Thrust includes an Alpha and a Beta priority for Renkei creation.
The Alpha Property would be in Ice, to close Level 1 Induration, open Level 1 Compression and Impaction, and Level 2 Fragmentation.
The Beta Property to be in Light, to close Level 1 Transfixion, open Level 1 Compression and Level 2 Distortion. (this placement is identical to the existing Double Thrust Renkei placement, although it won't make Reverberation due to the overriding priority of the new Alpha Property)
What this will achieve
1) Polearm (and hence DRGs) will be the number one early and mid game opener for Level 2 Fragmentation Renkei. This gives DRGs, who have A+ Polearm and exclusive access to the best Polearms pole position at killing flying critters, which tend to be vulnerable to both Wind and Piercing Damage.
2) We might see something other than mindless repetition of Distortion for 60 levels.
3) Viable backup weapon reasons for WAR and SAM to utilise Polearm in the early and mid game for flexibility (in a similar way to how WARs nowadays will use GSword in order to open Distortion)
The basic idea though, is to give DRGs the same kind of Damage & Renkei pairing that MNKs get with Fusion - an element and damage type that work together, not to make them hideously overpowered at everything, but to give them an advantage at their own specialisation - killing anything with wings.