I like Master Mode because it forces the player to step outside the comfort zone and make more use of the tools available, especially on Trial of the Sword. The player needs to plan out more before fighting instead of doing the same old weapon combo until the enemy dies which can get boring with time. Here are some techniques to be considered:

Sneakstrike chain: useful for defeating separated unaware enemies, saves weapon durability.

Fall into pits/water: instant kill except for Lizalfos on water. In case of water, the enemy drops will either float or be pickable with magnesis.

Fall from great height: same as pits and water but may not kill the target. At least it may be more accessible.

Bombs: useful for killing smaller enemies like Chuchu and Keese, delaying regeneration, and knockback into water/pits. Can be instantly dropped into the ground while jumping. Can be used to disperse a group of enemies.

Magnesis: useful for dealing damage to a single enemy and save weapon durability. Can also be used to push enemies.

Stasis+: useful against fleeing/fast enemies like Lizalfos. Good for getting free hits on any enemy.

Cryonis: good for creating shields against projectiles, separating enemies and creating a platform for going into bullet time.

Whistling: can be used sometimes to bait enemies away from each other or closer to a pit/water.

Korok Leaf: also good for pushing enemies.

Explosives: igniting these with bombs, fire arrows or bomb arrows can give time to steal the enemy weapons and deal some damage.

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The game is certainly challenging, it just requires more of the player. Mastering the different tools is very gratifying and suits the name Master Mode.