As Robert already answered (thanks for jumping in!), you don't have 
to pair it every time via the wizard, but keeping the Start + Enter 
combination pressed for a few seconds will be sufficient to connect 
the remote to Remote Buddy.

Regarding battery life: I didn't manage to run out of battery power 
on the BD Remote yet, but then I didn't use it for several hours in a 
row yet.

Bluetooth, while *grossly* more efficient than WLAN, will always eat 
up your batteries' power faster than an IR remote, as the latter 
needs only a tiny fraction of what Bluetooth requires. Keep in mind 
IR remotes are comparably simple constructs, while Bluetooth has to 
deal with a real protocol, keep the connection alive and do other non- 
trivial things.

For the BD Remote, I see no further optimization possibilities as 
Remote Buddy is not performing any operations on the BD Remote but 
rather just waits for incoming data. The only way to save energy is 
to use the two event / time driven auto-disconnect options Remote 
Buddy offers for Bluetooth remotes.

Best regards, 
Felix