100% dose of Revystar is 1.5L/ha
That said, this graph seems to imply that a full rate of Ascra Xpro performs about the same as 25% rate Revystar (£17ish?).
0.75 - 0.95 is the sweet spot I reckonses.
Going off this forum though I think there will be a lot of farmers requiring a great deal of curative activity to make up for cheap-as-chips T1!