Midstages of tournaments

That depends on what kind of stakes you play. At micros 3bets should be decent hands and usually shoves at around 30bb or...
Play 'small ball' - call with bottom of your 3betting value range is a good idea because players are so bad at postflop decisions (comminting themselves with bluffs with no equity or betting without any kind of a purpose, etc..)
At bigger games 3betting 99-JJ and AQ,AK are often good plays because you will either make your opponent fold their good enough equity or you will see all 5 cards.
At micros 3betting those hands often mean you will have to make a decision on the flop whether to commit your tournament life with your A high or 2nd/3rd pair.

Thanks for your input
I play micros, generally MTT's up to 5$/€.

YOu suggest shoving 30BB, generally I have read start 3bet shoving at 20BB so is this just a micro thing to shove sooner?

Usually I have been 3betting AK, especially mid to late stage when its a shove, but early on I have been trying out just calling as often I 3bet & still get called by 2 or more players and then never quite know if I'm ahead or not on the flop even when the A or K falls.

Yes, exactly. People just like clicking the call button with dominated hands, so charge them more - push deeper. Of course when you have deeper than 30bb stack its good enough to wait for good opportunity to apply your postflop edge.

Now, whatever you read - its not a rule, its more of a guideline.
For example - if Phil Ivey 3bet pushes with as high as 22.5bb, that doesnt mean that your 3bet push with AQo at 35bb is a mistake. It could very well be. But it would also be extremely profitable exploitation value push against a fish who would not fold any dominated hand. Just be observant when someone shows an "unconventional" holding and make a note.
And always experiment. If the GTO says you should value bet exactly half-pot OTR, you wouldnt make a mistake to do so, but it would be a better option to go with exploitative route and bet 3 times the pot if your opponent "has his Fold button disabled". Thats 6 times more value! ♠_thumbsup:
GL

Originally posted by nsavov
Now, whatever you read - its not a rule, its more of a guideline.

You've just hit the nail on the head there, I think I need to trust my instinct a bit more against theses really fishy players and not necessarily always make normal sensible poker theory bets etc