I joined a pt as MRD lvl38 and asked to be a tank. I was horribale, my tanking was really bad. I thought "well since its my first time thats to be expected".

But then I discovered that I need alot of abilities and skills from other classes. After checking with ppl in my LS, they told me I need to get this and that from almost every class.

I really dont wanna lvl another class to thier 30s just to get an abilities (espacially not before patch 1.20 hits)

So, what are the "must have" skills I need to get to be a decent tank in parties? (not taking about end-fgame).?
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tldr: What are the most important tanking abilies I must get to be a decent tank in groups?