This is for a cyclone COC assassin, dunno if deadeye gets access to any CD Recov. This is from Kami's COC :
https://www.pathofexile.com/forum/view-thread/2733675/page/1Which was the meta coc nova builds before 3.15 struck
1) you hit an enemie with Cyclone -> try getting 100% Hit Chance
2)on that hit you try to get a critikal strike -> try to get 100% critical strike chance for Cyclone
3)the hit with cyclone crits and your CoC gem activates so you cast on crit Ice Nova thats linked to it in your gem setup.
4)After that you Cospri's Malice is going to trigger and shoots Frostbolt
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If you wanne go deeper in the substance of how CoC works:
https://www.reddit.com/r/pathofexile/comments/e5pyr8/the_cyclone_cast_on_critical_strike_cooldown/Cooldown reduction is a very important stat in our build, cause there are Breakpoints we can hit to cast more often Ice Nova with Cast on Critical through Cyclone.
BP0 At 0-13% CDR you need to stay below <6.06 APS
BP1 At 14-51% CDR you need to stay below <7.57 APS
BP2 At 52%-57% CDR you need to stay below <10.1 APS
In the End we need to get the BP1 Breakpoint, so wee need atleas 14% CDR
you can get the stats on Boots, Belt or the awakening gem @lvl.3
If you have higher aps with your cyclone then the BP you got, you start missing casts from Ice Nova and loose a bunch of dps
for the aps calculation in PoB Fork:
1) import build
2) go to cyclone as your main skill
3) activate all flasks
4) activate Mistwalker, Tailwind, Onslaught, Frenzy Charges only if you got it from Gear, Gems or somewhere else