The build I will be using to level/PvP/raid:
https://classic.wowhead.com/talent-c...50500051022001
5/5 imp corruption for the instant cast corruption.
5/5 imp drain life & fel concentration because it's a drain tank SM/Ruin build.
2/2 imp life tap because it will help with sustain in PvE.
2/5 suppression because if you're fighting mobs/players your level you don't need any more points in this, and in raiding you will be spamming shadowbolts, which is a destro spell, so it won't help.
Then the usual talents for the destro tree, but imp searing pain because intensity is a totally useless waste of 2 talent points, and searing pain is what you will use in PvP when someone shadow locks you.
Also, the "cookie cutter" SM/Ruin build you will see if you google it is terrible, because 5/5 suppression is unnecessary and curse of exhaustion isn't worth the points. You're better off just taking imp drain life/fel concentration and face-tanking and fearing melee than trying to kite them, primarily because they have MUCH better slows than your CoE so you won't be able to kite them well anyways.