Originally Posted by
Dejnov
I've never really run a guardian Eido as my main so I'll have to defer to your experience, but he already has two Belial dupes so it's only 2 bricks. Not an insane or overtly tough investment. I would also normally agree with the Fire being a hard grid, but he already has one Mammon Whip; that's half the exceed problem right there. You can run phaleg staffs as your main with phantom; they're assault/defender which is fairly decent. That plus a couple phaleg axes or Union swords (they are available this year) is a workable grid. Of course, you're always going to be looking for fire lances, but I don't know the availability of those going forward.
I will also agree that Water/Thunder grids are incredibly easy to do and, if he's willing to run Ophiel, water will be a doable main choice also.
So you have two choices water and fire. I'd invest exclusively into those for now (like with awakenings etc.) and work to doing their guardian raids above others and see where you want to go from there.
Dejnov.