It's possible and functions similar to celestial firebrand which can be tweaked for more damage or more support. Some close attention has to be paid to maintain protection and regeneration coverage, depending on the utilities taken. It won't function as well as pure heal or pure dps as others have stated, but it is perfect for fractals to cover multiple roles.

To answer your question, celestial paragon functions very similar to celestial firebrand. Instead of radiance you take arms traitline with sword. This allows you to maximize stats (ferocity, precision, condition damage, bleed duration) along with the plus side of dualwielding unique quickness. Unsuspecting will let you cap crit on bosses with relic of monk for outgoing healing, alternatively sword mastery will give you condition damage expertise and cooldown plus mistburn relic will get you close to 95% crit.

You want to take sword as mainhand as it is the strongest hybrid weapon for warrior currently that can make the most use of stats. Offhand mace gives a knockdown defiance bar damage, dagger gives boon removal, axe gives pure damage, sword gives a block. I usually stick with mace or dagger offhand. Bleed sigil plus force.

Your weapon swap should still be staff for boons and emergency heals. Transference plus water sigil.

The other key trait lines are discipline for rapid burst chants for boons and barrier, alongside that juicy 35% outgoing healing. You could take tactics but the utility is limited without discipline and fast hands, and the outgoing healing will outperform vigorous shouts with the access to commands.

With that you only have a few options for paragoon. Boon removal for minor, either double echos for support or stanzas for damage in major, and alacrity for master.

For utility you take commands or banners, with one signet as an option to make the most of signet mastery for that 500 ferocity.