That's not true because I am thinking that Fooruman is a more entertaining person than Sam, so we would have a more interesting character to read about while we're not fighting. Sam has also been instrumental in the 3rd and 5th battles (more so than Fooruman) but we can easily learn how to live without either.

Sam's spells has helped so much more but from experience (not logic), Manaflare is pretty useless. I just love Foshzzle and Ramming speed. Fooruman.