Hi there, I can vouch that double lone wolf is viable - in fact its what I first tried in EE - tactician mode 2x LW. I did finish the game but now after starting a second playthrough without LW, I can say 4 party members is a lot easier - lone wolf benefits do not make up for the loss of 2 party members anymore with the glass cannon limitation in place now.
Its especially difficult at first with only 2 party members if you both get CCed. The pros of having 2 lone wolves are better hybrid viability with the extra skillpoints, less micro management and of course the extra health.
I would say if you want an extra self imposed challenge go with 2x lone wolf, or for the achievement. Maybe play through with 4 party members on your first playthrough then try 2x LW on second playthrough.
