I think the solution is to rely on hanging indents rather than trying to align with the column of the previous opening parenthesis, bracket, etc.

So instead of this:

  def some_method(param1
                  param2):
      statement1

you do this:

  def some_method(
          param1,
          param2):
      statement1

Hanging indents work regardless of whether you use tabs or spaces for indentation.