Make the daily reward some PvP EXP (75?), a handful of Wolf Marks (50?), and a few Tomestones (and I mean a few - like, 5 Philos max and/or 10 of the other). Have this daily reward able to be attained up to 5 times per day.

This will draw people in, because it will make Wolves' Den a viable alternative to FL, as far as rewards go, for at least 5 matches per day. Doubly so due to lowered queue times.