With the new support items, what's preventing double support bot lane funneling?
Soraka+Taric bot lane or something. Both take Targon's to hit 13 CS per 5 minutes, with each able to take 7 CS beyond that before gaining reduced gold. That's 4/10 waves. Yi or whatever from the jungle (or mid lane, while jg takes mid) takes 6 total waves. 1840g for each support by 20 minutes, and 3600 for someone else. That's 21.3% more efficient that perfect CSing.
More optimally, as far as time, One takes targon, other takes spellthief. Every 5 minutes you take 6-7 CS with targon's. That means you each can take 13-14 CS, which is 33-34 CS per 5 minutes, meaning you take about half the waves, while the jungler or mid (with jungler taking mid solo) takes the rest. Again, 1840 for each support by 20 minutes, and 3000 for someone else. 11.3% more efficient than perfect CSing.
Even more optimally, time investment-wise, double spellthief (Soraka Nami?). 40 CS per minute is 6 out of 10 waves. Again, 1840 for each support by 20 minutes, and 2400 for someone else. 1.3% more efficient than perfect CSing.
This means even the LEAST gold efficient method, and the easiest to pull off, grants your team a gold advantage. And that's Just off CSing. You also have the 1200-1300g worth of free stats on each support, plus the 1k they each generated from the support items. This means your team is effectively up to potentially 3580 gold ahead of the other team (since they also have one support item at the very least, canceling one out).
Keep in mind, the wave collections wouldn't be all at once. No mid laner is gunna spend 3 minutes bot lmao.
Also, this is assuming perfect CSing and rotations. You can normally get around 6000g from 20 minutes of perfect farm.
######Edit: I forgot about the jungle anti-funneling method Riot took, but this still means every 5 minutes you're getting 600 from bot lane. This means you must be making 1200 every 5 minutes from jungling in order to not be penalized. If you are AFK farming and take scuttles, you surpass this threshold.
This penalty is removed upon completion of an enchantment on a Skirmisher's Sabre or Stalker's Blade.
Also, not every CS is penalized. You don't instantly get -10g for every minion. You could do 2 full clears before you have to start taking gold from bot lane. That means 545g from minions before you start being penalized. That's 4+ waves early game. No penalty. Full farm, since you only need to take 4 waves every 5 minutes with double spellthief bot lane.
#That means 2552 total gold by the time 5 minutes has passed. Keep in mind a completed jungle item removes the penalty from minions, and it costs 2625g.
Math: (20.4gp10 x 6 x 5 minutes) 612 + (125 avg gold per wave x 4) 500 + 1090g (double jg clear gold) + 350 (starting item) = 2552g at 5 mins.
Even if you do end up penalized, its not very much that you're getting penalized on. You'd lose maybe 100g every 5 minutes. Losing 200g out of perfect farm, far boosted from jungling alone, is nothing. Especially when you're tossing all your eggs into one basket, like a Yi that's boosted by taric+soraka.
