I think "helpfully" -- in a helpful manner -- is a fine word, nevermind the grammar marms. I suspect Hemingway did as well. However, he tried to avoid words l

I think "helpfully" -- in a helpful manner -- is a fine word, nevermind the grammar marms. I suspect Hemingway did as well. However, he tried to avoid words like "utilize" that he could easily replace with shorter, more powerful words without losing any expressiveness.