WvW Roaming/pvp pov
Overall Dmg/Kill Contribution far too low, Supports in PvP need to be able to do more than raw healing. There needs to be ways to contribute to a Kill with either Dmg or Soft/Hard CCs ( Example Druid,Tempest) , Grav isnt enough,
Since Rifle has zero Mobility, the second weapon set basicly has to be Sword (Mirage ambush leap, virtu leap) which results in zero Dmg ( this is mostly important for WvW )
So comparing a Support Mesmer to any other meta Support, it becomes pretty clear that this sadly is just a weak alternative
Skill 1: higher Power coe or add Some damaging condition so Cele becomes a viable option, add clone generation
Skill 2: make it 1/2 s casttime
Skill 3: same as skill 2, Give it an immobilize
Skill 4: a weak excuse for a much needed CC, either give it some Dmg, a faster Casttime on Phanta or maybe a different effect all together like a 360* Knockback Phanta next to the mesmer with an AoE heal/cleanse to give Rifle mesmer some defensive capabilities
Skill 5: fun Idea, though not much of use, make it 3-5 uses and a 2 way Portal and u got a great skill with mobility for the Mesmer baked in which gives Room for another 2nd weapon set option other than sword/x