Critics like Luxemberg accused Lenin's idea of a "revolutionary vanguard" of being a new Blanquism, which he denied. Lots of rich debate in that back and forth. Fair warning that Lenin is kind of a bore to read.
There's also texts by early revolutionaries on the general topic of how extreme is too extreme. Trotsky wrote "Terrorism and Communism," for example, though I admit that I haven't read it. Unlike Lenin, Trotsky is usually an engaging writer.