I have a draytek 2910vg connected to my ISP on first floor and on ground floor the signal is weak..

I have a spare 2910vg can use it to connect it to the first floor router over wireless and extend the signal and have Internet over RJ45 port to my xbox?

what mode shall i use? Repeater or Bridge?
and which router shall I setup on ? the spare one or the one which is connected to internet already?