A control deck I've been brewing this month and finally cracked masters last night, the gameplan is pretty simple, ramp up and keep the board cleared with shen ra speaks and vestige. In all honesty themarket options suck and you almost always want to grab grodovs burden first, but if you're against aggro you can go for the relic weapon. The biggest tip for mulligans is if you cant cast crack the earth turn one and you have no other ramp, then dont keep that hand.
I still mostly grab burden like you said, but the fast spell denial and 4/4 weapon seems better than a 3/3 with a mediocre spellcraft (maybe I am underestimating the draw but I dont see myself paying 7 for a 3/3 draw a card) Visage is handy vs aggro but I havent tried monolith to know if it's good or not.
There isnt really much for combrei in the 5 mana slot so the market is probably a bit underwhelming no matter how you set it up.
I really do like visage though. It's been the difference between my relic weapons trading into an extra minion or helped me stabilize until I can shen-ra or hit 9 power for harsh rule quite a few times, while still being a 5 cost relic for all our relic matters cards.