unfair sniper deck, with ohko

Gisela, Blade of Goldnight+furnace of rath=ohko. it is difficult to block because it has firststrike and flying. In addition if a creature does not have hexproof or indestructible the deathtouch snipers will dispose of them so they couldnt block anyway.

Total war+Basandra, Battle Seraph+silent arbiter= enemy board wipe every turn
Silent arbiter overall works great with a sniper deck because it severely restricts enemy attacks. It does a good job of protecting Ajani Vengeant. It has amazing synergy with total war, and Basandra, Battle Seraph which allows you to pick which creature an opponent will attack with. Note you do not have to worry about your own field getting wiped by total war because snipers do not actually attack, and when you attack with a nonsniper you can tap all of your snipers to avoid the effect.

Sublime Archangel is also a good fit because of its synergy with silent arbiter and sniper decks as a whole, because it is really the only creature that will be attacking.

Furnace of rath is good in this deck because it boosts sniper damage. Normally the downside to it is that you and the opponent lose a lot of creatures whenever anyone attacks, however since you do not need to attack with your snipers, you may have silent arbiter on the field, and the only creatures that you would attack with have flying; You are safe. Additionally, you can also offset the drawbacks of furnace of rath with Gisela, Blade of Goldnight. If you have both cards out you will have a 4X damage multiplier and your opponent will have a 1x multiplier. You can offset the low number of Gisela, Blade of Goldnight in the deck by scrying with temple of triumph, and you can compensate for her high cost with Rite of flame