Requirements
This composition can only be played if:
You have Spatula True Damage.
Introduction
This composition depends one hundred percent on having a Spatula, but is really strong. The good thing about this composition is that you can put the Spatula in a lot of good champions , so you don't neccessary need a specific headliner. Finally, you're always going to want to end up putting the Spatula True Damage on Caitlyn, but, another good champions holders are Zed, Ahri, Jhin and Miss Fortune (if you play this units, you will change Mordekaiser, Viego and Karthus for units that have same synergys of your headliner).
Augments
The best augments you can have are Cybernetic and Combat Augments. Furthermore, the augments that give you items are not bad because you will have more than one tank, and the items that you may have left over from Ap and Ad can go in Karthus and Akali. Additionally, it is important to emphasize that because of being a Fast Level 8 composition, any augment that gives you experience or economy is really good (you should never have 3 augments of this type, one or maybe two are fine, but no more).
Best Augments
Items
Caitlyn can carry Ad items. Apart from the Spatula True Damage, his best items are the Spear of Shojin and Infinity Edge or Deathblade (these two items can be exchanged). Tank items, whenever possible, go into Mordekaiser before Ekko (except in situations of not getting Ekko level 2). Akali will be the off-tank holder, with two healing items like Hand of Justice or Bloodthirster and Edge of Night (Sterak's Gage or Titan's Resolve are not so bad). Other interesting items would be the Sunfire Cape since it is very good in early and reducing the healing of the enemies is very relevant, and Thief's Gloves since it is generally good.
Best Items
Other Good Items
Early-Mid Game
To play this composition, no specific headliner or champion is required at the beginning, since the objective is to set up the strongest possible comp and push levels. The best start would be any headliner True Damgae with more True Damge (at level 4 you play a Sentinel, at level 5 you play a Rapidfire, and at level 6 you play any good unit). Another possible strong start would be with Heartsteel, as this start gives you a lot of money, which is very nice.
Lvl 4 Comp
Lvl 5 Comp
Lvl 6 Comp
Late Game
Already at level 7, is when you fully direct your composition towards the final table. Here, depending on your life and how strong your table is, you can consider changing the headliner you have for one of cost 3 (which will be very likely to come out at this level), roll a little to stabilize or saving to go up to the 8 (this is the most recommended, but there are games where this will not be possible). When you reach level 8, simply roll until you have your entire table level 2, looking for the Caitlyn headliner preferably. If you find Caitlyn 2-star before Caitlyn headliner, you will look for Akali headliner.