To Bi-Wire or use Jumpers?

Hard to say.  Some speakers respond well to biwiring while with others it is better to spend more money on single cable.  I use both since my woofers, midrange and tweeter are all separate.  I use shotgun cable and AQ jumpers between midrange and the tweeter.  They come in silver plated or gold plated copper (I use gold)

https://www.amazon.com/SET-4-GOLD-BIWIRE-JUMPERS/dp/B005A5Z758/ref=sr_1_3?ie=UTF8&qid=1482853869...

https://www.amazon.com/SET-4-SILVER-BIWIRE-JUMPERS/dp/B0057FK8RS/ref=sr_1_4?ie=UTF8&qid=14828541...

A separate run is superior to jumpers. If you're using TQ then buy another pair of equal length. 

Short answer: it depends on your system AND improvements from bi-amping rather than bi-wiring is another different animal entirely.

NORDOST has a good succinct commentary:

http://www.nordost.com/downloads/NorseJumperinstructions.pdf

They also highlight that a shotgunned double run of quality cables with quality jumpers instead of bi-wires may be your best bet.... But take it for a test drive yourself.

CHORD has offered their two-bits worth in the same vein.... CHORD no longer makes dedicated bi-wires and also suggest that quality single runs with matched jumpers may be your better performers.

http://www.chord.co.uk/help-and-information/speaker-cable-guide/bi-wire-or-single-wire/

My own personal experiences:

a shotgunned double-run with matched shotgunned jumpers of high-end cables in the diagonal speaker hookup arrangement suggested by the NORDOST article beat all bi-wired contenders and pretenders in my system....hands down 

using the reverse method but will try the diagonal to see if it offers better sound...