with a devourer > bork > hurricane build hes doing half his damage in magic damage and with his huge attack speed hes getting tons of bonus damage off on multiple targets.
hurricane could potentially be replaced with a shiv for heavy jungle or single target priorities.
just think of the true damage stacks on twitch's passive too. 5 stack contaminate? no problem.
lets do some math here, those items combined are around 1.7ias, or for twitch with his Q up its 2ias++. (or more pending what level twitch is)
so, devourer has 60+ bonus magic damage, assuming it just procd into sated.
bork does 8% health in phys damage per auto, or now does 24% in 3 autos.
and hurricane will hit all 3 targets for that 10phys(ruunan base)+30 magic(50% from sated) + 8% phys per auto + half your base AD, well assume you have none but runes so you have 120~ at this level.
so if we get 3 auto attacks off, with 2ias, it would take a second and a half, so in 1.5seconds time we would deal 360+ 240magic damage from devourer + 24% of their base health. and we would apply 4 stacks of twitch's passive, so we could contaminate for 80 + 140 (35 per stack x4 applied stacks) +24% of their health in physical damage.
the grand total of 820 damage, +24% health damage over 1.5seconds. (add in the bonus procs on either the first and third, or just the second auto attack for increased damage)
now if we had 2 more targets to hit with hurricane bolts the damage would be 300damage (half of the 360+240) to each from the auto attacks, but contaminate would be the same for all 3 targets for 220 each.
NOW IF TWITCH WERE TO USE HIS ULTIMATE, AND EACH BOLT OFF OF HURRICANE NOW HAS PIERCING AS WELL, TWITCH WOULD APPLY STACKS LIKE CRAZY AND PROC MULTIPLE ON HIT EFFECTS AT THE SAME TIME FOR TONS OF DAMAGE, LITERALLY TONS OF DAMAGES, ALL THE DAMAGES WOULD BE HAD WITH THIS BUILD AND MULTIPLE TARGETS TOGETHER
i can not stress enough how much bonus damage twitch would be dealing with this. with an IE, and a LW, and a filler item of choice twitch would melt whole teams by himself.
every single bolt pierce of twitch procs bork and other on hit damage, ruunans also now gains piercing and ALSO procs on hit damages, this gives twitch the opportunity to proc multiple on hit effects at once. bolts of differing targets can go to other targets that you are currently hitting with the main bolt because the hurricane bolts gain PIERCING. its literally going to be tons of damages.
with 
would use her Q twice every second hit.
who would be able to proc silver bolts every other auto or
with double bio arcane barrage on every other auto, however just because they benefit greatly from the passive doesn't mean that that champion is any good at jungling.
Like how