Any single role character is doable with any meta.
Riggers do have some confusing rules though, and even though there is a rigger book out, there still isn't consensus on what rigger stats are used for a lot of functions when jumped in.
There are different things riggers can focus on. Do you want a lot of drones? Do you want to pilot them yourself? Do you want to focus on a suped up vehicle/driving it? Both? Do you want skills outside of rigging?
That being said, my instinct for all-around troll rigger would be:
Troll A (get that edge!)
Attributes D (I am of the opinion rigger dicepools/strength comes from the control rig rating, otherwise they are too attribute dependent)
Mundane E (keep it simple)
Skills C (keep it simple and rigger focused. Piloting, Gunnery, Perception/EW, basic sneaky/talky).
Resources B (This should be enough for a suped up van, rigger 'ware, some starter drones/RCC, and some basic runner gear. Most riggers pick Resources A, but as a troll, I feel like that edge is more important. You will earn more money when you play).