Just to chime in on the prep thing, if you intend to 'power up' an ability by preparing it further it requires subsequent mentions. However, as it stands the attack would have a single prep if it has only been mentioned once, though that's still enough to overcome a barrier which has no preps at all. There's also the debate whether any hits the character has taken should impact 'stored' preps, but that's another issue entirely. I don't -think- Dazsos is arguing the rune has been powering up this entire time, as he did just say it was 'dormant.' Not unlike my pillar elementalist, he casts a spell and then leaves it (presumably in some visible form) until he needs its effect. Pre-preparing the ability essentially, sort of like loading a crossbow and pulling the trigger when a target appears. 

I only interject because while I enjoy watching debates I'm not a part of, it seems this most recent one is borne from a simple misunderstanding. 

Innue is probably going to judge eventually, but from a cursory glance at the OOC (and logic) this barrier defence was not prepared in advance, therefore the beam takes precedence. Damage from a single prep attack is not expected to be overwhelming, but the barrier should fail according to T1 Eden, and the statistical evidence Dazsos gave is a neat explanation for why it does. (Though if I'm wrong and the shield was prepped and the beam insufficiently prepped forgive me, I haven't read the entire fight thoroughly.)