I’m an idiot and used my delver bounty on a T4 delve 🫠, can’t get into m0 as ilvl is too low (275) - Most efficient way to get 290+ for next week?

I’ve unlocked T11 delves and have done 8 to give me 3x 298 vault choices, have done both world bosses and all weeklies.. this got me from 264 to 275…. what else can I do to try and hit 290ish before the season starts? Tried making my own groups for m0 but after 3 hours I gave up.

I thought field accolades, perhaps.. though I’m not sure how fast they are to collect..?