Negation should be a 4-of in most blue sideboards
The whole livestream, uncommented but with all the Dutch background mumbling, can be found here: Also great to see was that there were a lot of Dutch Old School veterans, a lot of players from the regular X-point monthlies but also a lot of new players who took their first steps into 93/94 Old School Magic
Another useful feature is a built-in lore counter tool players can use during games to keep track of their and their opponents lore
Strength and willpower is more important for non-evasive characters, which tend to get involved in challenges more often
If the plotted card has any mandatory additional costs, those must still be paid to cast the spell
Mill is a viable strategy and can see plenty of success with some support cards like counter spells or board wipes, but its far from being the toughest alternate win condition out there