Clutch job, motor mounts, oil pan and turbo oil lines, all at the same time?
 

So I need to change the clutch and seal the oil pan and turbo oil lines as well as getting poly mounts in there.

Any advise? Can it be all done at once? or better do the clutch first then the oil stuff or viceversa?

I'll be working in my garage with the car on jackstands.

Makes sense to do it all at once. Oil metering pump o-ring and crush washers too if they are leaking.

my concern is how to hold the engine... no tranny or motor mounts? support it from the shock towers?

I use a cross brace that spans the fenders

I would likely be easier to just pull the engine if you plan on doing all that at one time. I had to do the oil pan a couple weeks back in the car and I forgot how much of a PITA that is on its own. If you have to disconnect from the trans, remove the motor mounts, and reseal a pan I would just pull the engine.

I'd say pull the engine as well. If the person doing the work knows their way around the engine bay then it should be stripped and out in about an hour (iirc). From there you will probably save time and money because of how easy everything else will be.