Hard to say what’s “closest”. Some specs still use the same abilities they’ve always used but now they have some new stuff to tack on which makes them very different. Others might not have the exact same spells they used to but the idea is the same.
If you’re looking for slow or simple specs we can answer that. If you’re looking for same concept but modern/faster (eg. Generic builder/spender, doing damage over time) we can answer that too.