Interesting house rules - they'll certainly add to variance.
You have relatively little removal.
Pacifism was reprinted recently and is efficient. You'll need to watch out for
Dromoka's Command, but that's about it. There are plenty of other conditional removal spells to consider in White. Green also gets fight cards -
Epic Confrontation is a fairly good one, and also cheap (though
Dromoka's Command is almost always better assuming you get your colors).
If there are any two cards I would cut immediately upon looking at this list, it would be
Vine Snare and
Market Festival.
Vine Snare is a conditional
Fog card, and such effects are usually run in decks using them as part of a dedicated stall strategy.
Market Festival will help fix your mana, and helps to ramp your mana up, but usually you want to be casting powerful spells turn four. It's quite likely the extra mana will go to waste.