Best place(s) to train 50 - 100 for low-tier characters?

does GMS have tangyoon cooking class?

if yes, then thats a good pq to do for level 60-90 (its even better for players 80+, about 50% per pq at 85 or so, should take like 8-10 minutes per pq)

You cannot do it in 8-10 minutes. It takes 3minutes and 20 seconds for each ingredient (it takes that long for the spawn to reach 100). You will go a minimum of 18 minutes per PQ.