Member Azronger's response is filled with glaring misconceptions actually:-
1. Sith Spirits are not anchored to any world (strong in the Dark Side) such as Dromund Kaas, Yavin IV, Ziost and Korriban among others. They are anchored to objects/artifacts/tombs (focal points of dark side energy) but their spheres of influence are restricted accordingly.
Valkorion was not anchored to any object/artifact/tomb and his essence was able to teleport from one world to another (Dromund Kaas to Yavin IV; Yavin IV to Ziost; Ziost to Zakuul) and roam an entire world freely (Ziost).
There wasn't any need to highlight conditions of several worlds such as Dromund Kaas, Yavin IV, Ziost, Korriban, Zakuul and Odessen - a chunk of the response is useless.
2. In regard to discussion about the Outlander, member Azronger is playing with semantics and ignoring the bigger picture.
"A being of unfathomable power and insatiable appetite, he transcended death multiple times, shedding his physical shells as they were discovered, defeated, and destroyed... only to return in another form."
Taken from codex entry titled "Fall of Valkorion."
A single statement is never all-encompassing and binding; we have to concentrate on the bigger picture and piece together bits of information to achieve a higher understanding of theme.
Valkorion transcended death multiple times throughout the course of his existence and he didn't had to latch onto a living being nearby to cheat death in each case. Member Azronger is mistaking a 'plot device' for all-encompassing reality which is erroneous. He doesn't even know that Valkorion abandoned the Outlander for a while during the events of KoTFE and KoTET and he doesn't understand that Valkorion was 'manipulating' the Outlander into doing his bidding throughout - he doesn't play the game (it seems).
3. Loss of strength is expected in each episode of cheating death but Valkorion could rebuild his strength, even as a spirit, which is apparent from his exploits in Yavin IV and Ziost respectively. The blog assert that Valkorion's essence can manifest his powers outside a physical body which is absolutely correct.
4. Tionne Solusar is wrong in highlighting limitations of Sith Spirits in general? I don't get member Azronger's beef with the revelation. Yes! Even a scholar is fallible but this doesn't imply that we dismiss his/her observations without a valid reason.
5. Member Azronger is misinterpreting quotes about Palpatine as indicative of his power as a spirit which is not the case. My blog contains numerous quotes which highlight Palpatine's actions as a spirit and they are limited to Essence Transfer mostly. He also overlooked the part of Jeng Droga in making the journey of Palpatine's spirit to Byss possible after the Battle of Endor.
6. The Skywalkers disrupted Palpatine's hold over his Force Storm above Da Soocha V; the Force Storm became erratic and destroyed Palpatine's fleet consequently. However, Palpatine's spirit transmigrated to another cloned physical body on Byss.
"Finally, the Emperor was consumed by his hyperspace wormhole.
But a single clone had survived Luke Skywalker's attack. Emperor Palpatine revealed himself as two of his subordinates were displaying an alarming lack of loyalty and attempting to complete the destruction that Skywalker had not finished."
Taken from Dark Empire: Hand Book no. 3
In summary:
Palpatine's essence could not manifest his powers outside a physical body, and he needed a supply of clones to ensure his existence after loosing his original physical body in the Battle of Endor because his essence could not resist pull of the void for indefinite period. When supply of clones diminished, Palpatine visited Korriban to solicit help of Sith Spirits for preserving his last cloned physical body but they informed him to take Leia's infant body instead.
There is literally no comparison between the abilities of Valkorion and Palpatine, outside a physical body, respectively.