Just finished my first Guardian Defender Squad and I learned allot about painting orange while doing it. The way I paint my Eldar is that when I wash these mini I need to be allot more careful so the wash don't pool up anywhere, I had to re-apply base and layer colours on several miniatures. The second thin is that Troll Slayer Orange is a thin colour and might need to be applied in several layers to achieve a smooth layer.

I'm not totally satisfied with the result, but they look good enough for me to put on table.

Base coat - White

Orange
Base - Jokaero Orange

Wash - Reikland Fleshade
Layer - Troll Slayer Orange (you might have to apply several layers)
Highlight -Fire Dragon Bright

Green
Base - Incubi Darkness
Layer 1 - Kabalite Green
Layer 2/ Highlight - Sybarite Green

Black
Base - Abaddon Black
Highlight -  Mechanicus Standard Grey

Enjoy!