I suppose gold-usage-per-life would be nice to see.
edit: money earned per life would also be really interesting! In theory, one could even calculate money earned on average per kill aswell (but it wont tell you anything about the players skill due to savage's lottery loot system on enemy kill)
This would be less useful since killing creeps (like monkits) increases your gold without any actual danger/fighting.
So to boost that stat, you just need to spend time killing creeps each life, which goes against it being useful to determine skill.
There already is a "NPC kills" stat to determine team-helping value (together with resources mined).