I don't feel you can make an informed decision without knowing your Oncotype. You can ask for the report. It will give you an Oncotype score, your ER and PR score, whether you benefit from chemo (with chart over time) and risk of recurrence with hormonal therapy assumed (tamoxifen so an AI is a little better , most likely).

Doctors tend not to go by grade anymore. I was grade 3 and other nasty stuff but low Oncotype. If you ER is highly positive then letrozole will signficantly decrease risk and in general we are told that these meds cut our risk in half.

Usually oncotyping informs whether chemo is a good option…vs risk of recurrence etc.