Heyaz again!

So, most of the time Instances go well. But sometimes, there are some really, really awful tanks. Any advice on how to deal with:

- undergeared tanks

- jittery tanks

- selfish (is that the term for that?) tanks

- a combination of the above

My gear is decent enough, so I can outheal most stuff. And a SC Raise is always possible. But y'know how it goes sometimes...

Thanks in advance