Those ele block shield

Hi guys! i wonder about the Invictus Solaris, Vix Lunaris and their fused Magna Eclipsis. If you use seperated depanding build you can have over 200% increase armour, ES/Eva and 1 immune ailment but only block 1 type of ele damage. Fuse and use Magna Eclipsis can give you block 1000 damage of all ele but cut down to +80-100 ES/Eva and don't have the immune ailment any more.
So you guys prefer the separated or the fused one?