yes it's esthetically better, usage wise it's not, generic rank 4 will always be better to summon, They just don't create generic monster that would be too strong.
That's a really bad advice. You don't want to put a useless monster in your deck again.
Watch Cat is not bad because it can special summon itself. And it's a cat.
Bunilla has a nice DEF and it can be summoned with Unexpected Dai and other cards.
But it's not really "Synergy". They're just the best of some bad monsters.
So you need:
1-The galaxy trap
1-xyz monster on field
1-photon/galaxy monster
2- photon/galaxy cards in hand.
Basically, 4 four 1.
No thanks. I prefer to try summon gate guardian.
Cool!
Also, if I use it to revive Infernity Archfiend when I don't have any other cards on my hand, will it trigger its search effect? Or will Infernity Archfiend miss timing, despite the lack of a fiend in hand to discard?