Guardians... they are somewhat known to be the worst Archetype but listen to me there's hope. With this Deck you can achieve quite something. Get both equip Spells Tryce and Ceal into your hand with various searchers, and equip them to Eatos, Grarl or Dreadscythe and then flip Reverse Trap! The result is a 4k Beater which can attack twice directly and result in 8k direct damage! To even get there cards like Guardian Baou and Power of the Guardians can go into the offensive or kinda stall with Kay'est until the necessary pieces are found (More on that problem further below).
Easier said then done, this Deck is slow and modern Decks easily outpace you and your strategy but many decks struggle to find the immediate out against Kay'est or Baou plus Power of the Guardians which can result in a sudden Ceal Tryce OTK if the opponent takes to long to find the answer. I Certainly could achieve some wins in Master Duel with it and it's fun to see Branded and the likes surrender against Guardians of all things.
Slash Draw helps this Deck out a lot since you can keep the Monsters out of your Graveyard and get more free Eatos Special Summons out. Furthermore Arsenal Summoner might be a slow Flip searcher but if he connects he can search any Guardian Card, Power of the Guardians included.
As a Bonus let me introduce every Guardian it's equip and it's problems below:
Guardian Dreadscythe/Reaper Scythe:
He's kinda good to be honest. If Guardian Eatos dies through destruction, Battle or Card Effect he can be Special Summoned from the Hand and equip itself with it's Scythe Equip but from Deck only. That one gives 500 ATK for each Monster in any Graveyards which makes him easily 10K plus. If he's send to the GY you have to special summon him back from the GY by discarding one card if possible. He prevents Normal and Special Summons for you which is fine since the other Guardians are often set first anyway.
He's a clean: ★★★★★
The equip is OTK strong: ★★★★☆
Guardian Eatos/Celestial Sword:
Another very good one. She can Special herself for free as a 2500 ATK beater without once per turn but your GY can't have any monsters to use this effect. She can send Equips equipped to her to the GY to banish up to 3 Monsters from the opponents GY and gain 500 ATK for each until the End Phase. No once per turn again making her easy 4k plus. Her equip triggers when it's send to the GY and gives one Eatos on field additional permanent 500 ATK for every banished monster which brings her over 10K easily yet again. WHEN YOU CAN, so it can't be triggered with her own effect...The best other way would be to use another Monster and run into an opponents monster by Battle to trigger the Celestial Sword OR you are fancy and equip the Rod of Silence to the Monster which is equipped with the Celestial Sword to trigger it that way.
She's easily a: ★★★★★
Her equip misses timing: ★★★☆☆
Guardian Tryce/Twin Swords of Flashing Light:
Guardian Tryce is a very overlooked one. He like all of the remaining Guardians needs his equip active on field to be summonable and can otherwise only be set face Down. If he's tribute summoned and then destroyed he summons the Monster used as a tribute back to your field even if it's the opponents Monster (Imagine Soul Exchange plus enemy Controller with him). Pre errata he could do that even if he was tribute set and summon the monster from anywhere which made for some funny moments. Resummon from the Deck/Extra Deck/Hand (Stuff that is Twin Behemoth level of ruling trouble). His Twin Swords are one part of the OTK Combo making them very necessary.
Yeah he's kinda bad in pure Guardians: ★☆☆☆☆
His equip is necessary and fine: ★★☆☆☆
Guardian Grarl/Gravity Axe:
Guardian Grarl is good if you are able to empty your Hand down to only him and have his Gravity Axe equip active he's a free 2500 ATK special summon from the Hand. He's a Dinosaur too by the way. His Equip looks like nothing but can be crucial to victory. It prevents opponents Monsters from changing their Battle Position leaving weak Monsters left in Attack open to a 10k Swing from Eatos/Dreadscythe.
I like this dude: ★★☆☆☆
His equip is a good one: ★★★☆☆
Guardian Baou/Wicked-Breaking Flamberge
Guardian Baou has a measly 800 ATK but trust me he's a good one if he's equipped with Power of the Guardians. If he can destroy just one Monster by Battle he gains a permanent Boost of 1000 ATK and negates the effects of the destroyed Monster forever. Forever means that any Effect that might activate in the Graveyard from the destroyed Monster will be negated no matter when. His equip Spell has the same effect negation ability which is very good against Graveyard Strategys if it connects. He can get out of Control easily and become your third big Boy if the opponent can't find an out soon enough.
I give him: ★★★☆☆
His equip is good too: ★★★☆☆
Guardian Ceal/Shooting Star Bow:
With 1700 ATK Ceal is the strongest normal summon if his equip is active on field. He can also send equips equipped to him to the GY as cost to target one Monster from the opponent and destroy it, no once per turn, that's how we like it. His Equip Spells enables your Monsters direct attacks to the opponent, making it another important OTK Combo piece. Equipped to the opponent their Monster can't attack directly and only looses the 1000 ATK which is great.
He's nice to have: ★★☆☆☆
The Equip is Versatile enough: ★★★☆☆
Guardian Kay'est/Rod of Silence:
With 1800 DFF the best set and pray defense from Guardians. With her equip active you can summon Kay'est to get a Monster unable to be attacked and unaffected by Spells BUT the opponent can still attack you directly which makes her a suspicious Wall choice. Her equip Spell negates and destroys every Spell that is targeted towards the equipped monster. Union Monsters hate this card for sure. It's a good surprise choice with Armory Call to catch some targeting effects too.
She's nice to have: ★★☆☆☆
The equip is strong: ★★★☆☆
Guardian Elma/Butterfly Dagger:
Due to the Banlist Elma is unusable since forever. If she would be able to be summoned she can recover one Equip Spell from the GY and equip it to herself. The forbidden Equip Dagger is returned to the Hand whenever the equip is destroyed. Many infinite Loops helped the Butterfly Dagger to appear on the Banlist soon. Even an in Archetype Loop exists. If you equip the Butterfly Dagger to a Monster which is equipped with the Rod of Silence it's destroyed and turns back to your Hand creating an infinite Loop. Combined with Spell Absorption/Fire Princess we got a classic infinite Life Points infinite Burn Combination.
She would be good: ★★★☆☆
The equip is broken level 9000: ★★★★★
Try this Deck if you are a crazy person like me and don't mind to loose more then winning.
Overall Rating: ★☆☆☆☆☆