Is Sym Supreme Awakened still worth R5 if I have Doom?

Next aims are 100% variant 2, Act 6.2, 3 and 4 first completion. Is Sym supreme still worth R5 if I already have Doom at R5? My sym supreme is currently at R4, sig level 85.
If yes, what fights in act 6 is he good for (apart from the champion)?
If yes, what fights in act 6 is he good for (apart from the champion)?
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However SS can periodically place Staggers without even making contact, which can sometimes be a lifesaver. He also has a fantastic blanket Nullify of any and all existing Buffs on the opponent whenever he activates the Chthon’s Cunning blessing (via natural rotation or via SP3). This is usually where he takes the edge over Doom, especially since the blanket Nullify synergises fantastically with MD.
He covers a lot of ground doom and claire dont?