I don't know about a pattern, but I do know a trick that worked for me 3 times, and I'll share it if ya wanna use it.
My friend told me that he figured this out. Wherever you placed the VERY FIRST elrue you used when you enhanced, place the next one 2 blocks after it. For Lix, 3 blocks afterwards, and so on. That's how I was able to get my +7, but there is a chance that it might not work so...be careful! lol
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