Example 1.3
Step 1 - Exploit inevitability
Don't go off the second you can! Ideally you want to be in a position where you can shrug off whatever they do.
A) Wraths - Remember that in this deck when you go off that Wrath is actually a 1 for 1. If you hard cast the Rites you're laughing because you just replay it and go off again. If you flashed it back then you might want to hold off on going off until you also have a disciple in the yard because you can just sacrifice the angel to draw 4 cards (which should let you chain into another Rites, Mulch or Salvage).
B) Counters - It doesn't matter how inefficently you play as long as you resolve the Rites so don't be afraid to recklessly play out your hand to bait them into tapping out in order to clear the board or play a blocker.
This deck is extremely resilient, even if they counter a rites or wraith the board after you don't care. All it takes is you drawing or milling into another rites and you just combo out again. This means you don't need to win when you go off, simply burning a rites to gain life, refill the board with blockers and to put pressure on your opponent when you're behind is completely fine.
Step 2 - Sideboard
Your main concerns are people shutting down your combo or people killing you before you can go off so your sideboard should cards which fit your decks theme and help deal with this.
Cards that deal with enchantment or artifacts stopping you
Cards that help you surivive until you go off
Spells:
4x Mulch
4x Unburial Rites
4x Grisly Salvage
Creatures:
3x Cathedral Sanctifier
4x Avacyn's Pilgrim
4x Scorned Villager
4x Fiend Hunter
3x Disciple of Bolas
4x Geist-Honored Monk
4x Angel of Glory's Rise
Lands:
4x Golgari Guildgate
4x Selesnya Guildgate
4x Orzhov Guildgate
6x Forest
4x Plains
Sideboard:
4x Acidic Slime
4x Devout Chaplin
2x Gnaw to the Bone
5x Anything you want
In total this deck will run you about $15 to make ($20 if you need the basics/gates but you can get those for free at drafts).