[Paul1980au]

Heres the strategy -

You want a fleet to do this

Couple of escorts that can bLast any defending ships
A larger ships with point defense cannons to bLast any missile sats or WPs.

Anothe ship with beam weapons to take out sats - dont drop youre troop ship until all planetary satelite platforms are bLasted. If you have a troop ship with shilds that can move quickly you can drop them on small planets with WP - make sure you have at least 100 troops on board to do the job remember the planet gets 1 unit for every 20 pop they have so for a 4000 pop planet they will have 200 basic armed units - so you will need at Last 300 to do the job.