Need advice on revamping this formation.

[Raydenksk]

Yo guys, I recently reached lvl 88 (on chinese new year too) and I've been rocking this formation for awhile now.

:bst::malehero::vik:
:art::witc::mnk:
:mnk::sha::exo:

I think its high time I made some improvements. I'm already gonna replace :sha: with :ora:, thats a given.

What I want advice on is about replacing my :witc: with an :inv:

And whether having both a:art: and a :can: is feasible or should I just replace the :art: with said :can:

I think its obvious I want more stun pressure now.

I also been hearing good things about :jan: but I'm not sure.

[Cheesecake]

PvP, Cannoneer > Arty, cuz DI is useless in FL, and cannoneers debuff decreases accuracy which can come in handy. Also cannoneer has marginally better stats. PvE, nothing wrong with keeping Arty, cuz DI + ravaging = nice def debuff. Jani > Inventor for dmg, Inventor > Jani for stun. If you PvE more, id take jani over inventor. For PvP, take your pick.