I don't think R'lyeh's heroes justify taking a luck scale, in and of themselves. They get a gate summoner who is marginally better at first, then just becomes obsolete when he gets high skill anyways? They get an Aboleth with 4W/4S which is nice, but only 2 misc slots, so ultimately not that spectacular. And they get the Visitor who is 2A/4S or something. Yay, now you finally have an air mage.... with no water.
He is pretty neat, but nothing to base a strat around a small random chance to possibly, maybe, eventually get him.
I'm a bit surprised by this Cold talk, it actually has NO effect underwater at all? No income loss or fatigue? Wouldn't 3 Cold somewhat hamper your land expansion though? And also, why do people prefer Cold over Heat in this manner? Inquiring minds want to know, I love R'lyeh, and some extra points would really strengthen my approach.
Also I really have to say, despite other scales, R'lyeh really needs 3 Order, they are so gold hungry (top mages non sacred, primary unit 50g apiece), and unless it's going to be a very fast game, at least 1 Growth to insure that even if you get some bad events, your overall income won't decline over time, but a steadily growing pop is very good for them, as upkeep will mount rapidly once you have your second castle pumping out mages.