First card is meh. Not bad, but could be broken, considering you could just bring the monster back, destroy the field spell so the monster doesn't get RFP side-effect
The last card seems to be not really worth the pain and agony of summoning, FGD seems to be difficult enough to get onto the field as-is, and then to fuse it for an equivalent card seems to me not to be worth it just for indestructible beatstick who is still vulnerable to cards like Compulsory Evacuation Device.
Also, HUGE Dragon + 5 random monsters = Warrior?
lol