You could always consult @the8anarchist, whom i believe to be the grandmaster of support builds in GD. Here is his original post and build where he discusses it. I found it while experimenting with my own support ideas and realized he had the same exact thought process and had actually posted a build doing it!
Also search @WyreZ. He has taken up the mantle as the godfather of Apothecary support builds, and has posted a TON of them. I know you will get a lot of great ideas/feedback from him!
I myself have a support deceiver but never actually made an original post about it, youll see it discussed as you search around for the specific terms “support deceiver”. Main difference i think was gear utilized. Most people favored sacred texts of menhir for offhand but i elected to use an item enabling dual wield, and dual wielded Mythical Touch of Purity because i wanted as many on-demand/push button heal skills as possible, and DoTs are a thing of the past with these babies rotating off and on while one is on cooldown.