Back in the day I did brayflox HM runs. 50 myth a run and 1500 for each animus book and 13500 myth needed in total.
So I did around 250 brayflox runs.
Granted, it was faster than what u have now, which would be 240 Antitower runs but my point is we are not new to this kind of grind.
Frankly, if u want it 1k eso a day isn't that bad if u play enough. u figure a Antitower run is 20 minutes, so 200 minutes, or just under 3 hours. Or do ur roulettes plus Antitower runs.