Springspection Reward

Hello! Just wondering which rewards I should go for now that I've got the skins and theme.

I'm in my level 70 run getting ready to prestige, just working on one last shield bot. I've got a lv 2 timepiece that I can use already in my crate, and I should get enough flowers from Springspection to buy the two needed for that 5% time shard boost. The question is, do I do that or get the astro chest and something else?

I have 190 astro coins and 135 energy cubes and I'm saving up for the Colossus. But if I do unlock the Colossus now, I won't make it because I'd lose timeshards for the t2 Legendary group. Got next to no poison runes, not gonna do another long grind before prestiging (max level and just finished 3rd archdemon, 3rd robo chicken, and remaking the reaper I used for Cursed).

As it stands, a 2% boost will net me 45614 shards, a 5% will get 46956.

I'm kinda leaning towards astro and 2 treasure chests, but I'm paranoid about messing things up for myself down the road.