Well, start with numbers.

"Fast" -- how fast? 200kHz might be the repeat rate, but how quickly does it need to settle when switched?

"Low resistance / inductive load" -- how resistive, how inductive (range for each)?

"Very accurate" -- how much? And within what time frame?

Is it always 10.000..A exactly, or is this the maximum of a range? What's the minimum, and what error is allowed down there?

Likewise, when switched off, how fast and accurately does current/voltage need to go to zero? What threshold counts as "off"?

This is a very unusual set of requirements, and it's likely you need something else entirely. If you can start at the beginning -- describe what you are doing and why -- likely a better overall solution can be proposed. For example, maybe output level doesn't need to be accurate at all, it just needs to be measured (either self-calibrated, or adjusted gradually over time as a feedback loop). Maybe RF analysis techniques can be applied (e.g. to measure load resistance/inductance or real/reactive power), or other industrial solutions (e.g. induction heating power measurement).

Tim