I'm playing around with my mother tongue so I tried to translate sentences that I might write into Chinese. One of them was this sentence, in English.
"The great strength of Annie comes from the long range of her fire ball."
I put in:
安妮的主力是她的很长的(???)火球.
What should be in the missing slot?
In gaming field, (of) long range is commonly translated into 远程 or 远距离, and ranged attacked is 远程攻击. You can use 射程 when you want to express the notion of range.
By the way, 主力 is not the right word for strength. If you use 主力 here, it means primary (attack method). To say strength you may want to use 强项 or 优势.
So I would translate this way:
"The great strength of Annie comes from the long range of her fire ball."
安妮最大的优势是她远距离的火球。
I would use 射程, which means "range of fire" in English. Are you sure that you have all those 的s in the right place? Although 远程 is the more common way of expressing long range, it obviously cannot be inserted into the sentence given.
Long range ballistic missiles are translated as 远程导弹
so I would say 远程火球
