Pos 5 Support Ward Duty: Should Pos 5 be expected to buy 100% of Sentries and Dust?

Options

• Yes—that's the core job of Pos 5 so Pos 4 and cores get items.
• No—Pos 4 should split vision costs 50/50, and cores should buy their own Dust.
• In modern Dota, supports need items too; vision burden must be shared.