Resistance will have no bearing on how gunked your coils will get. The gunking comes from certain ingredients within your juice carbonizing. Sweeteners, in their many different compositions is is one of the culprits. But there could be others. What is unknown is the temperatures at which causes this carbonizing. Sucralose may carbonize more at a certain temperature than frutose, as an example.
The temperatures needed to vaporize juice range between ~320°F up to around 450+°F, depending on the composition of your juice (props to
@mikepetro for his tests). We set our power to reach these temperatures depending on the coil we use. Lower mass coils require less power than higher mass coils - but all operate within this temperature range. There are exceptions for those who enjoy a hotter vape, but below 320°F does not produce much vapor at all. The sweeteners, or specific ingredients used within certain e-juice could and does carbonize within these temperature range.
If your juice contains an ingredient(s) that is prone to carbonizing, then all coils regardless of their metal will gunk up. The amount of these carbonizing ingredients within the juice will dictate how quickly the coil gunks. With commercial juice we have no idea what ingredients are used. With DIY, and a little research into the flavourings, we can avoid ingredients that are more prone to carbonizing. For myself, I've just grown to accept it. There are juices that I have consumed that can be referred to as coil killers - but I enjoy these juices and accept they just come at a slightly higher cost of operation over ones that do not gunk as quickly.
