Sure the Government of Canada 5-year bond, according to Cat math is almost guaranteed to rise from its current 0.949% yield to 4.3% within two years!  That's a lottery like 350% return/bet over two years. And you somehow think that is a reasonable assumption? WOW! 
Tell me what have you ever seen/prognosticated other than your crystal ball yields are going through the roof (hasn't happened, has it?) and gold will be $5,000/oz shortly(oops, no) and ENB will drop to $20 per share (too bad not so far) and (we still have seven weeks to go on that guarantee of yours that BMO wll trade below $80/share).
The debt/equity ratio might be "atrocious"(but only to you) for a company that is in a high risk business. It is obvious that ENB is not and in fact is in a very low risk, conservatively run business.  As you note, ENB's debt/equity ratio has fallen as has its risk.  
Your ENB's "meltdown" 12/31/15=$46, today it is $53.51. Not including divs. that's PLUS 16.3%  +22%=cat meltdown wow