When you choose this way for your monk you gain unlimited hope and masterless for great and heavy weapons. You are a master and expert of heavy weapons and you must survive in this apocalyptic world. Maybe you have a tample maybe you are alone but the most important think is surviving and hope. You can not lose your hope and mind you must be confident.

Great Weapon Technique

Whenever you hit with one of your Flurry of Blows attacks as an action, you can attack with your great weapon as a bonus action. But if you do this you roll a d4, if you rolled 1 you gain disadvantage to your next dice, if you rolled 2 or 3 you gain nothing, if you rolled 4 you gain advantage to your next damage chance dice. And you can use your great weapon or two handed weapon with one hand.

•  If you rolled 1 you gain disadvantage to your next dice,
•  If you rolled 2 or 3 you gain nothing,
•  If you rolled 4 you gain advantage to your next damage chance dice

Heavy Sharper

At 6th level, you gain the ability to heal yourself. Equel to your wisdom modifier per short rest as an bonus action, you can roll 1d8 + your wisdom modifier and you can add this bonus to your next great weapon damage.

Smite of Hope

You can cast branding smite to your great weapon as a bonus action, you can use this ability equel to your wisdom modifier per short rest. When you do this your branding smite not a spell. And if you take 1d6 damage you can add 1d6 to your branding smite damage. You can add 1d6 equel to your wisdom modifier. 

Determination Master

You can attack with your great weapon in one turn equel to your number of wisdom modifier but you can not use bonus or reaction if you do this in this turn. And you can cast banishing smite as a bonus action and equel to your wisdom modifier per long rest and your banishing smite not a spell anymore. You can increase the damage of banishing smite equel to your wisdom modifier and you can add 1d10 equel to half of your wisdom modifier if you take 3d8 damage per every 1d10. If your wisdom modifer is an odd number you can upgrade higher modifier.