All of this, though unless I have a planet-based joker, then I don't personally find the planets all that appealing - it really feels like a drop in the bucket compared to jokers in terms of base chips and mult.
I find Planets are more powerful with better hands. A pluto for instance is nearly useless early game, but a single saturn can get you through the first two antes on its own.
I had a run on nebula deck today where I made it to ante 6 just slamming saturns and straights over and over, no scoring jokers.
Eventually you need X mult to make it to ante 8, but I think you can usually get away with as little as 2X mult if you are hitting saturns.
One difference is that this is mult that comes before cards-in-hand get scored, so steel cards (or 1.5X for kings in hand joker) have something to work off.