Since it sounds like your issue is that you are having trouble beating the level here is a simple little guide for alpha 5 that will let you clear the level with ease and you shouldn't loose any units if you are careful because this is what i do on insane and if it work on insane it will work on the easier difficulties to.
Step 1:
recycle all my units, and upgrade them
first I build 18 heavy machine-gun viper half tracks,
then I build 2 viper half track mobile repair units
next I start constructing 18 mortars and a scanner and 2 more mobile repair units
then I load up 8 heavy machine-gun units and 2 mobile repair units and take off
Step 2: move your 8 heavy machine-gun units and 2 mobile repair units here to activate reinforcements.
Step 3: call in 10 more heavy machine-gun units.
Step 4: move here and knock off the scav's while you wait for your reinforcements.
Step 5:
while you are doing this your heavy machine-gun units should arrive so call in a scanner 2 mobile repair units and 7 mortars and move your 2 mobile repair units and all your heavy machine-gun units here and take out the scav's
Step 6: once the scav's are down, set your units to hold fire, and destroy the scav base, under no circumstance should you attack the new paradigm base yet we don't want to attack this till are mortars arrive and we can set up an ambush for the new paradigm units.
Step 7: move here and hold position till all your mortars arrive
Step 8: set your mortars and scanner to hold fire attach your mortars to the scanner and move the scanner here, and continue to wait for the rest of your mortars
Step 9: when your mortar arrive set the scanner to fire at will
at this point it will trigger the new paradigm base you will get the cut sequence and the new paradigm will come and attack you, however they are about to get flattened because they are walking into my trap.
Step 10: once the new paradigm units are dealt with take out the base, use the mortars to knock off the turrets and use the heavy machine gunners to take out there units.
at this point the computer is more or less finished and its just a case of mopping up and doing your research, easy enough.
best advice i can give is never let your units get killed the longer they live the higher rank they become and the more powerful they are because with each rank your units become tougher and can deal more damage, so if you want to get anywhere particularly when playing on the harder difficulties never let your units get killed even if then means you need to runaway and repair before pressing the attack again, also make use of the retreat on medium or heavy damage states these will causer your units to retreat to your LZ when the specified damage threshold is met and if you have a repair bay which you gain access to at the end of alpha 5 the retreat on X damage states will make your units retreat to the nearest repair bay instead of your LZ.
also make use of commanders when you gain access to them on alpha 6 since they confer additional bonuses that make the attached units even stronger, and the best bit is that units that are set to retreat when damage will return to there assigned commander after going to get repaired which helps a bunch on the later levels.