
Pick relic according to who you are facing in Duo lane and or jungle. I myself will judge risk vs reward based on the rest of the opposing team. usually if I stay alive long enough to use my health potions I will buy a health chalice and a ward on my 1st back. Can also swap one health potion for a Multi potion.
Keep in mind you may be slightly week early game because of your obvious lack of mobility abilities with Sol, Positioning will be key. Don't be afraid to use ult defensively when aped by jungle etc... You'll more than likely be buying Death metal by the time Book of Thoth gets max stats.
this may be for a niche group of people but if you are struggling with the lack of projectile speed you can swap this late game
Swap Book of Thoth for Polynomicon if you want to increase amount of build intelligence total, for death metal use