I do frontlines for il70 acc as a gsm, it works quite well. If you get the 10% marks buff from your FC you get 660 marks for a win. You need 1 win or 2 second/third place finishes for each piece of il70 acc. A match usually takes 10 minutes to complete. The new matching method makes the wait time 1-3 minutes. You also get 50 myth and 25 sol regardless of the outcome. Also, halatali HM is great for DL acc. Even if you DF it there are usually 1-2 chests people do not open. If you want IL80, you should not do CT, but do the new dungeons for il80 gear in the chests. The second boss chest has acc gsm can break down.