Agreed on all points Drip.
For what it's worth, based on previous events, summon raid boss currency is probably more useful in phase 1 than phase 2 because bosses with more HP will last longer in phase 2 (although probably not as long as before if they keep hitting only once). In the last 3 RB events, once we hit phase 2, it was rare for me to login and not see a list with multiple RBs on it. I'm certainly not planning on hoarding mine.