What a fantastic pedigree!
What are your breeding goals? Eventer, hunter, jumper?
Was the mare ever approved by one of the Warmblood registries?
The Precipitation sire line jumps out at me. It could be really neat to cross her to any of a significant number of stallions with that same direct sire line… Easy to find via Furioso II. There are several with 2 lines to Precipitation…
Mannhattan is available fresh here in North America. He’s a wonderful multi-talented stallion - I’m biased though, as I have a 4 year old by him (who is fantastic). I believe Kannan is available frozen from Judy Yancey… You could go KWPN that way, but still get that same direct male line going back to Precipitation. It depends on the mare’s confirmation, temperament and your breeding goals… The mare is VERY nicely bred though and there are lots of great great stallions out there who could complement her on paper.