Right now, I am a summoner; DoT DPS with Ifrit summoned.
My attacking primary skills are:
Ruin, Bio, Bio 2, Miasma
I also drop Shadow Flare when I can
For Ifrit, I have Enkindle, Spur, Rouse, & Sustain
I also have Aetherflow & Bane & Fester
For more damage, I can pop Raging Strikes, which does make the DoT's hurt more

I ALSO have Physick
I off-heal; I can keep myself healed, or help heal others to take some of the load from Healer
I can also rez people during a fight, which means the Healer don't have to stop healing.

I consider myself 'DPS with an Off-Heal'.

Now, I know I have to go Red Mage if I want to continue that..but is it that cut & dried?
I don't want to be THE Healer in a group. I am a backup healer. I want to be DPS first.
I had friends I used to WoW with who forced me into the Healer roll and would blame me when they pulled half a raid, so I LOATHE being a main Healer.

So can I keep being a 'DPS with Off-Heals'? or will RDM's be more healing-focused?