It is very important to know the reason why a stock had its weakness in the 2018 sell off, this could help in choosing the right companies, ready to rebound as I have the impression that several high quality gold companies are rebounding because fund outflows of last year have ceased and now these companies are closing the discount they had versus other gold stocks. I guess this is only the beginning. If gold goes to 1400$+ these companies will continue to outperform.

Mag suffered last year due to fund redemptions, I guess these outflows definitively have stopped, looking at the chart of MAG :

K92 is another story, posting very impressive high grade results and increasing its production rate,  very good looking chart and cheap company

Torex finally left the debacle of last year with union strike behind, and is rediscovered by fund managers looking for cash flowing companies:

Osisko Royalties: same story, solid company finally getting recognition by the market

Wheaton Precious is another good example of fund flows changing: the stock completely rebounded and posted new highs