If you take the Walls track as far as Trappers hut, and then veer left a little (actually follow the long wall of the hut that is nearest the track, and keep going that direction through the bush). You'll eventually come across a bit of a foot pad. This is a nice alternative (and actually easier) route into the Walls, and ends up at the top of Jaffa Vale, where I've camped a few times. I think it would be the most direct route to Daisy Lakes, although I've not been that far in myself. I know other people who have used this route to Daisy Lakes.
I've followed Wild Dog creek between this route and the Walls track, and although it is not difficult, veering off at Trappers Hut is a MUCH easier walk (a lot flatter).
So, follow the wall of Trappers Hut and keep going in that direction, until you find a foot pad. This route soon meets a creek which it then follows for most of the first section, as far as the edge of George Howes Lake (near Tiger Lake). Keep following the valley, which soon meets the deeper Wild Dog Creek valley at 90 degees. Descend to Wild Dog creek (this valley intersection can be clearly seen on the Mersey map), cross over, and then ascend the other side and continue in the same direction following another creek most of the way through Zion Vale then keep going to just north of Mt Jerusalem.
Not sure where exactly would be the best place to veer out of Zion Vale towards Daisy Lakes, but I hope this much helps!