I know when to use LB, thanks

[Eidolon]

But wouldn't people then demand you save it to "link up"

A lot of us did that, and really, that's a very effective strategy overall. However, keep in mind, for 4-man content, the only two that would really need to 'link' are probably 2 DPS. And even then, if they both just used their own seperately, I doubt it would affect anyone negatively because let's face it - 4-man content is pathetic in this game.