Of course everyone is going to be building toward a full relic'd clone squad eventually.
I'm talking about Div4 where people have a couple dozen or so G12, and only have a few relics. But if one of those relics is on Fives, and the rest of the clones are only G10 or 11 with one G8, that relic power is getting spread to the rest of the squad on the first AOE your defense does against them. It is like 4 relics for the price of one, and allows an inferior clones squad to beat much better teams in GAC.
The fix I would propose is that Fives only sacrifices himself for G10 allies or above. Just like they made Zombie only do the sacrificing/reviving at G10 or above.