I would mitigate windshear risk using the following techniques:
If windshear is reported, double the reported gain or or less in knots and delay your departure by that many minutes.
Use maximum thrust instead of a reduced thrust setting for takeoff and climb
Use the highest permissible flap setting for takeoff in your aircraft
Use the longest suitable runway
Use the flight director
Reference your operator's performance calculation methods to see if they have a "suspected windshear" option for takeoff speed and perforamance calculations. This will incrase Vr and V2
up to the performance limits and give you greater stall margin should windshear be encountered after liftoff.
I wouldn't improvise with wind input techniques unless that method was published and sanctioned by your operator.
The thrust settings your computer gives you should take into account all factors including runway condition, length, obstacles, aircraft performance, weather, deferred maintenance items etc. It should be adequate to maintain that setting to 1500 AGL (assuming the NADP-1 departure profile is used).
However, with windshear suspected, I would simply recommend simply using maximum thrust! This guidance has been consistent among the various operators I have flown for.
Hope this helps.