Glyfair
Explorer
To suggest something different, how about an Artificer/Cleric?
Artificer's tend to spend a lot of time back in support roles (especially given their long casting time on their infusions). Cleric gives them additional flexibility in that area.
In addition, when you want or need to get out of the support role, you can easily buff yourself into a huge walking tank (given enough time).
I will also second the Artificer/Warlock combination. The ability of Warlocks to take 10 on Use Magic Device at 4th level is huge for an artificer. Artificers don't get that until 13th level, IIRC.
Of course, if this is a 20th level game (it's not clear whether you are planning 20 levels ahead, or you are creating a 20th level character), ignore that and go in a different direction.
Artificer's tend to spend a lot of time back in support roles (especially given their long casting time on their infusions). Cleric gives them additional flexibility in that area.
In addition, when you want or need to get out of the support role, you can easily buff yourself into a huge walking tank (given enough time).
I will also second the Artificer/Warlock combination. The ability of Warlocks to take 10 on Use Magic Device at 4th level is huge for an artificer. Artificers don't get that until 13th level, IIRC.
Of course, if this is a 20th level game (it's not clear whether you are planning 20 levels ahead, or you are creating a 20th level character), ignore that and go in a different direction.