This won't prove to be a game breaking combo, but since Dagger has Support on her last click as a Ver and she is Spiderman TA, could she have Bullseye's 11 attack value shared with her via Sinister Syndicate to make her a mega accurate healer? The way I understand it is that this is not a modified stat but a replaced one. Right?

Right. It should work since you can use the Defenders TA to drop the defense down in a similar fashion, but I've never seen anyone ask about the SinSyn ability specifically.

I've been proven wrong a couple times today, but I would rule that you can.

I think you get to share the AV only in attacks, not for Support rolls or anything else like that, but I'm not sure.

Synister Syndicate reads: "A member of this team may use the unmodified attack value of an adjacent friendly member of this team instead of its own."

Doesn't sound like they say what you can use it for. In my opinion.

That would be the best possible support value!

And...
urlmaker is correct. The team abilities aren't modifiers, but replacements. I do not see why it would not work.

I read another thread about this recently, and I'm pretty sure the official ruling was that it works.

And Support is considerd a close combat attack. I havn't asked on this as it was not a possability in the past. Now I guess it is. But I would see it working the same as Deffend and Support so it should be able to be used. (E Dr Strange can share his 12 Def with other Deffenders/Wildcards and heal them with a 7 attack needing a 5 or better.) Since Deffenders and Deffend work the same, I would guess Sinister Syndicate would work for this as well and Dagger could share it for a high "Attack" support roll

Cool, maybe I'm right about something again...

I already asked this question 2 weeks ago in a different thread and I can't remember if it was PL or Hair10 that told me we could do it, but we can!

We need a SinSyn support (How about a Dr. Octopus that actually acts like a doctor?)

I like it! While Bullseye is pimping up Dagger's AV the wounded's Def can be lowered as well thru JSA/Defenders ability if the conditions are there. And you can PC that, too!