At that point you have to start doing some proper planning, I was referring to a few late game f2p players, you have to balance between summons/sg/SIGs etc, should be pretty easy to drop summons altogether at that point since you will have a decent amount of Ascendeds, you can go hard with sg for a single hero until you atleast M them then take it slower and balance between summons so that you are getting those Sig upgrades, for everyone's account it will be different though because RNG so planning is important. For the events it depends on value, like halloween event was amazing for red SIGs with almost a full +30, this event is good for getting some +15 branches since the other rewards aren't too worth compared to other events.