You are pretty safe picking up a Pup, even if someone else does go for an aggressive red deck you will still be fine and will still have a good RX aggro deck if you want to stick with it
Getting it to cost just 1 to equip is fairly easy, and if it ever costs 0 it acts as a defensive ward you can slide around as you need to
To showcase this ability, I constructed a Sealed Commander deck from my Cube
We had 18-month, rolling rotation, some sets being two years and others being less than a year, the end of small sets, the death and return of Core Sets, plus more Standard bannings in the last three years than anything since Urzas Saga Standard
Sun and moon era I'd have to Crimson Invasion, I've never pulled anything good for any of those boxes, vintage wise I'd say Jungle as holos were really hard to find, but in a box you'd get a few