A new class would probably be best. However, they may be against adding a fencer class because they would prefer to expand existing Class->Jobs first. In which case GLD(30)BLM(15) + CNJ as a melee/magic DPS class could work quite well.
A number of GLD skills would need to be changed in function when the RDM job crystal was equipped:
- Some/all of the damage reduction buffs (sentinel, rampart, aegis, etc) would need to be changed to be more offensively focused.
- Halone would be changed into an offensive debuff, perhaps an elemental reduction similar to the BRD song.
- Riot blade would empower the next X spells cast based on the RDMs STR value. This allows the RDM to cast spells while focusing on the STR stat of a melee DPS.
- Perhaps some additional directional requirements (side/back attacks) would be added to parts of the Halone/Riot combos since they like to do that for melee.
- Flash would be changed into an offensive AoE. Would also be empowered by Riot so you can either Flash -> Flash -> Flash for basic use or Fast->Riot->Flash for max potential.
This sets up the basic rotation as:
Halone combo to apply debuff
Fast -> Riot -> Spells (x however many)
Halone combo when debuff drops off.
RDM would get Fire and/or Blizzard base spells from the BLM to increase the available spells.
Possible RDM Job specific skills:
- Offensive DD and Dot spells. Not *required* since BLM could provide Fire/Blizzard and CNJ provides Aero.
- Enfire (or other weapon enchant) as a limited buff that needs to be reapplied frequently (perhaps under the Riot effect for max potential).
- Double cast to either double casting speed or have the next spell fire twice in quick succession.
- Refresh *could* be added, but it would need to be like the current BRD song. It would need to be an AoE buff on a longish cooldown. It has a base cost and drains the RDMs mana pool (like flare). It would apply a debuff to the RDM to reduce his outgoing damage by 20% (ish) for the next 15sec (or so). The long cooldown and penalty keeps them from being "refresh bots", but it allows them to provide an important support role that currently only BRD provides.
High end gear (Darklight, allagan, etc) would be shared with either the MNK or LNC.