thanks sentence... maybe

[mella]

僕なんがてお役に立ってるなら。
If only I could prepare for this battle...
This is how I would translate, but in the context it seems alike "I am happy for this".

[Ongakuka]

I can't see anything about a battle there before I say anymore, are you sure it's not 僕なんかで for the first part?

[mella]

Yes you're right. I made mistake typing it.

[Ongakuka]

Ok, no worries 僕なんか would fit because it means that the character calling himself 僕 is humbling himself.The verb 役に立つ means to be of use, or fulfill a role, right? So I guess your sentence is something along the lines of 'If I am able to be of any help,' although I suppose with the original Japanese it's easier to guess the context.

Feel free to ask if there is anything you are unsure about