The matchup is honestly dominated by drawing the red sideboard cards, one of the rare spots where oversideboarding would honestly be better
Well, with Altar of Dementia out, you can take out another player by eliminating their library altogether, giving them a very narrow window to do anything by the time their next draw step comes around
Hypnotize and Improvize are two actions that replace themselves, while Strike a Good Match, Tinker Bell, Pongo, and Lucky all give you card draw while also allowing you to filter your deck and select the optimum card for each situation
The reason Hopper isn't higher on this list is that, despite being one of the first two cards to introduce Investigate to the red colour identity, he doesn't have any ways on his own to use them effectively
Aristocrat Triggers We have the obvious Aristocrat triggers that aren't synergetic like Blood Artist and Zulaport Cutthroat
many Ninja support cards are enchantments