Armageddon Comes ( ͡° ͜ʖ ͡°) 2: Recycling Guide Titles

20% from talent = 80% of cooldowns
25% from octarine = 60% of cooldowns = 40% total reduction

The magic lifesteal was sarcastic, as implied by the kappa at the end. Even with Sheepstick and Octarine in his final inventory, Chaos Knight is beaten on DPS only by Terrorblade, and is considerably tankier. Thusly, it's not an issue to sacrifice a slot, and almost removing your ult's downtime is worth the slot you spend on utility.

That said, if you don't want to build Octarine, don't. It's a 5th or 6th item anyway, so games will likely be over before you get it. But in the ultra-late, it's invaluable.

It's not getting OC *just* to reduce cooldowns, though you're seriously undervaluing a total 40% reduction to all your cooldown. Octarine means you don't need boots for teamfights, so... you're getting Octarine stats, plus whatever other combat item you want.

And of course the spell lifesteal from the huge amounts of magic damage you deal kappa