So, basically, what I was thinking is, since the Wither Storm gets stronger over time, I think that the Symbiont should spawn 2-3x stronger than before when the Wither Storm is in Phase 6-7, now, I know this sounds similar, but I was thinking of a variation between the phases. Phase 5 Symbiont should be the default one, while 6-7 should be stronger. Now, what I mean by this is, it has more health, stronger blows, spells become even more intense than before.