My multiplier is usually around 1.5, so yeah... Not much difference. And 300 trophies cards are very rare for me. Even with Glasses there could be 100 trophies card or even just 6 silver cards - 4-5 with 50 and 1 -2 with 30. While sucessfull answer during Choice of Fate sometimes give 300 Trophies too.
As for the Radars - they just make every roll "lucky" - that's not always Trophy Chance - they also trigger Boss Encounters quite often aswell.
But on Bonus Stages the base chance of getting a Boss Encouter or Tropphy Chance is high enough to get them almost every second time you roll the stage, even without Radars - so you almost don't need them there - while on normal stages there are alot of "empty" rolls and normal "triplets" of Exp, Pero, and Gifts, so you will get much more profit from using Radars there, and on Bonus STage you can even get not bad amount of 300s and 100s even without Radars and Glasses. So Glasses are of a really big value to save them for Trophy Chance _only_ if your multiplier is very high - for players with only N SECs they are almost of the same value if used on Step-Upped Trophy Chance or on 1 O Choice of Fate, since 300 or 368 Trophies is not such a big difference.
Stopped playing all Nutaku's games (and, thus, using HBC and other related forums) around 06.2016