So what this means is if I run Breaking the Ice once every day on EE, I would need 4200 : 60 = 70 runs, well over TWO MONTHS to get my comms.
Toss in EE FoT and it drops to 52 days -still wayyy too much, and flat-out impossible in an off destiny.
Add Impossible Demands because it's so very quick, and I can gain an average of 100 comms per day -and STILL take well over a month. And in reality it will be much longer as there is NO way I could run Break anf FoT untill I hit level 25 or so (never mind being unable to play because it takes too long to fill a pug).
And again, without a viable end game, there's no actual REASON to ETR. The past lifes are too weak to be interesting, and there's nothing to enjoy them in anyway.
Religiously farming the most time/valor efficient quests may mean I *can* hit 4200 in about a month, but, you know, there's this new Discworld book here that I very much want to read, there's all sorts of real life stuff cutting into my free time like the anual school meeting today, and if that's not enough, there's my 8 alts that also want some love. Oh and lets not forget the renown and loot (which I do take regularly since I also need plat)... I'm not GOING to religiously farm anything. Instead, I'll just keep my main at cap, and level my alts to 20 and do a heroic TR.
If that keeps my interest for another year, I'll then have a look at Endgame: does it exist by then, and is it any good? If not, or if I loose interest before then... Well thanks for all the fish.
Tl;dr: getting 4200 comms takes WAY to much time afaic, for far too small a benefit. Not going to bother.