On a serious note....If I had to shoot that weight and draw on a CANADIAN deer....I would use a POINTY 2 blade head.
Contrary to what many believe all bheads are NOT the same...they are designed to do different things....they are TOOLS...and you don't build a house with just a screw driver.
Using an overly tanto will not be an advantage....it will tent more at impact, and its NOT going to bust through a heavy Canadian shoulder with the 'bone busting' advantages that a tanto gives with a heavier weight bow....so...
Take advantage of POINTY heads, or a SLIGHT tanto, that wont rob you of energy at impact and let you travel further with that light weight bow and arrow. And remember....folks hit a little back about 85-90% vs too far forward(study done right here on TradGang).
So again, place your bet on the MOST LIKELY worst case scenario of too far back and lets get a pass through....
I don't find BroadHead discussions silly....I find them serious.