Myron can't really 'charge' multiple spells at once, he can't charge many of his spells at all! I don't think it'd be right to say he cannot prepare multiple runes at the same time, though, especially since some of his runes are combinations. Making it so it's impossible for him to use certain spells until a 5 turn cap is met would put him at an extreme disadvantage. Certain powerful spells that can be enhanced, he has access to, similarly to charging, but they definitely can't be done in one turn flat. This is where I've constantly mentioned that if T1EA was applied, I'd still be able to say Myron played by the rules.

I'm contemplating the draw right now, I'm gonna' be busy all weekend, so I'll get back to you on that. Feel free to mention what disadvantages Corban primarily suffers outside of T1EA, okay, [@Divinity]?