
As for the list itself:
MANA BASE:
3 Boros Guildgate
1 Clifftop Retreat
8 Mountain
10 Plains
1 Slayers’ Stronghold
CREATURES
1 Ash Zealot
4 Boros Elite
1 Champion of the Parish
4 Doomed Traveler
2 Firefist Striker
2 Lightning Mauler
1 Silverblade Paladin
3 Skyknight Legionnaire
1 Spark Trooper
2 Sunhome Guildmage
1 Thalia, Guardian of Thraben
2 Truefire Paladin
Some of the other creatures are certainly worth mentioning. Firefist Strikeris an interesting card. His Battalion ability reads that if you attack with him and at least two other creatures, you can target a creature and have it unable to block for that turn. Not a bad card, but I think there are better options. Lightning Mauler has a Soulbond option to give a creature haste, which isn’t bad. Skyknight Legionnaire is an old Ravnica throwback, a 2/2 flyer with Haste (the author actually prefers the old artwork, as well as the Arena Foils).
The last couple of creatures, Sunhome Guildmage and Truefire Paladin are interesting, as well. I find the Paladin a bit better than the Guildmage. The Guildmage has an ability for 1WR that gives all of your creatures +1/+0 until end of turn. As it’s a mana ability, you can potentially use this a couple times in a turn to deliver the final blow. However, his second mana ability for 2WR to put a 1/1 soldier token with haste on the board is over-costed in my humble opinion. He's useful as the head of a Pauper Commander deck, however.
However, the Truefire Paladin is a nice little uncommon. He’s a 2/2 Vigilant for RW, and his mana abilities are strictly better than the Guildmage’s honestly. His first ability gives him +2/+0 until end of turn for just RW. His second ability, which also only costs RW gives him first strike until end of turn. I definitely like this guy, but he was a bit slow for Standard. (Likewise, he makes for an aggressive leader for Pauper Commander.)
2 Boros Charm
4 Gather the Townsfolk
4 Pillar of Flame
3 Searing Spear
You’ll certainly want to be running 4 copies of Boros Charm, but the other spells here are good options. Four copies of Gather the Townsfolk interacts quite well with the Champion of the Parish by activating his ability twice. If you decide to focus on the Champion, Gather the Townsfolk is for you.
Pillar of Flame and Searing Spear are pretty standard removal/burn cards that you pretty much have to sideboard at the very least.
Sideboard
3 Bonds of Faith
3 Electrickery
2 Oblivion Ring
2 Skullcrack
2 Thunderous Wrath
3 War Priest of Thune
This was a pretty solid sideboard here for the Standard meta at the time. Thunderous Wrath and its Miracle ability could always pull a win out of nowhere. Skullcrack was the perfect answer to Thragtusk, and continues to be very strong card in Modern. Electrickery is a nice option against token-heavy decks or decks that love to throw out a lot of 1/1 creatures.
Oblivion Ring is standard white removal, which has since been replaced in Standard by the functional reprint Banishing Light - which can only target opponent’s things. War Priest of Thune offers a great way to exile nasty enchantments. Bonds of Faith is the only card here I’m not too thrilled with. It’s an Enchantment that gives a creature +2/+2 but it has to be a Human; otherwise, it can’t attack or block. I’d ditch these in Constructed, as there are far better options to consider for pumping your creatures quickly and cheaply.
"BANG" for Your Buck?
This deck gave you more “bang for your buck” than most event decks I’d ever seen before it. The Golgari event deck during Return to Ravnica was also very solid at the time. However, the Vampire Onslaught deck from Magic 2012 is still the best value Event Deck ever, due to the Verdant Catacombs and two Bloodghast. Both of them are huge Modern and Legacy cards, especially the fetch land, Catacombs. (Verdant Catacombs wasn't quite to the price point that it is now.) Still, Boros Rally was probably the second-best ever at the time
If you were running Boros at the time that Innistrad block was still in Standard, it was definitely worth buying at least one copy of this event deck. Many people just bought them out for the Clifftop Retreats, Champion of the Parish, and Silverblade Paladins for Naya Humans. Is it worth buying now? It does have Ash Zealots, 2 Boros Charms, Clifftop Retreat, Champion of the Parish, 2 Skuillcracks, and Thalia, but that’s about it for value.
If the Silverblade Paladin is ever worth more than $2 again, it’s worth a buy. But if you just want to buy it just to play the deck, you’ll make most of the value back easily. Just remember that the majority of the cards aren’t in Standard, anymore, so don’t try to play it at your FNM unless it’s Modern.