Getting one onestar character rostered is enough for DDQ purposes. Outside of that one node, you will not use it, but getting the DDQ rewards is enough of an excuse to keep it around.
Other than that... it looks like you are starting the threestar transition. You will want all twostar characters champed eventually, but as long as you are relying on them in Daily play you probably don't want to farm them anyway.
Roster spots will be tight for a long time for you, you should not use your HP for anything else. Get what rewards you can in PvP but don't shield. PvE will probably be your main source of Resources for a long time going forward.
Don't open any Legendary tokens at this Point in the game. You need a solid threestar roster Before you can even start to look at four- or fivestars. If roster spots are tight you may want to consider Selling off a single cover fourstar to save a threestar, the threestar covers come around much more regularly thanks to the DDQ.
Also, be careful with your ISO, the high levels are expensive. Level up characters only when you need to, there is a big ISO Crunch coming.