To Sid, in short, no, you can't make sense of the Companion's figures because it contradicts so much in the books. The Companion in general is poorly written, and has been torn apart by many knowledgeable fans of the series. And this stretches far beyond the One Power content.

Just a small list of contradictions with RJ's work, from memory:

Aviendha says Egwene is as strong as Amys and Melaine combined. Clearly a vast contradiction of the Companion's attempt to hash together a strength list.

Cadsuane is stated to be weaker than the wondergirls in the books - again, clearly contradicts the Companion.

Siuan is less than half her former strength after being Healed - this is stated by Leane herself in the books. Again, this clearly contradicts the Companion's so called strength list.

Further information from the books that discount this, is the fact that Rand can break free from a shield held by 3 sisters - and Logain could possibly break free from a shield held by 5. Contrary to Sid's theory, a man can not in fact break free from a female shield that exceeds 100% of his strength. In fact, he cannot even break free from a shield that is less than 100% of his strength. We know this because according to the Companion itself, Logain exceeds Nynaeve's strength, and yet he could not break free from her shield on him.

The fact that 6 sisters could not defeat a False Dragon on at least two occasions in the past, further emphasises the vast gulf between a Tier 1 or 2 channeler, and the average Aes Sedai.

The idea that Egwene is at 80% of Lanfear's strength does not fit at all with the books. Just like it is reaching in the extreme to theorize that when Egwene talks about matching a Forsaken, she is talking about being able to overwhelm that Forsaken with 200% of his or her strength.

No, Egwene is talking about overwhelming the actual strength of that Forsaken. Just like Nynaeve defeated Moghedien strength for strength.

This is confirmed by the fact that Egwene speaks about Nynaeve alone in the same way as she speaks about her, Romanda and Lelaine being able to face a male Forsaken. She says that no Aes Sedai except Nynaeve could match Moghedien. There is no reason to believe that she is referring to herself, Romanda and Lelaine being able to match a male Forsaken in any other way than how Nynaeve faced Moghedien.

The list goes on and I have grown kind of bored by this, after the Companion more than proved that its contributors had very little insight into RJ's true understanding of the One Power.

In short, they botched it. And badly so.