Ecthelion vs 100 trolls???

[Gothmog]

No, I wasn't thinking of Hurin. Actually this question popped up in my head when I was reading an other thread, the one about the strength of a troll (Just how hard is it to kill a Troll?). Somebody wrote something about Ecthelion killing 100 trolls, but they weren't sure there either...

Olorin, are you sure they wasn't as powerful as the "Moria-Balrog"? And maybe there wasn't armies but if you read Sil. you get the impression that they were more than 3...maybe even more than 7.

Regarding their strength: in the beginning of sil. (Valaquenta) Tolkien writes (translated from swedish, please ignore my errors)

And terrible amongst these deamons were valaraukar, the scourge of fire which in Middle-Earth were called Balrogs, deamons of fear

(isn't deamons of might???)
It's also said that they joined Melkor before Arda was created. I don't think the Moria-Balrog was different or more powerful than the others, but the warriors were more powerful at the time of tha battle of Gondolin.