Default A bricked Z1 with an unlocked bootloader

So I got my Z1 yesterday, was on 4.4.2 stock unrooted. I unlocked the bootloader using Sony's official website and fastboot, then I went on destroying the phone by flashing Philz touch recovery.img through fastboot.

And since then the phone has been bricked, I can only enter Fastboot through the blue led, while Flash mode doesn't show up any LED light and my PC sees the phone when on flashmode as n "S1 device with a parameter error".

I've tried all drivers, none worked, and the flashtool keeps suggesting I should update my drivers when connecting the phone on flash mode:

02/042/2014 22:42:11 - INFO - Device connected in flash mode
02/042/2014 22:42:30 - ERROR - Drivers need to be installed for connected device.
02/042/2014 22:42:30 - ERROR - You can find them in the drivers folder of Flashtool.
Is there any way I can recover from this through fastboot instead of the flashtool? I can still flash system.img and recovery.img through fastboot. I'd really appreciate any help right now.
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Past: htc HD2 - Samsung Vibrant - htc Inspire - htc HD7 -Motorola Atrix - htc Sensation - Galaxy Tab 7" - Motorola Defy - HP Touchpad - htc Amaze - Asus Nexus 7 - Viewsonic gTablet - Motorola Photon - Sony Xperia X10 - LG Nitro HD - Acer Iconia 7" - htc Rezound - Motorola Atrix HD - htc Flyer - Motorola RAZR HD - LG Nexus 4