Board Thread:Questions and Answers/@comment-5610300-20180104053550/@comment-5138166-20180104060851

Kais and STR Buus are your only options. I have one at SA4 and on two PHY SV leads, he can reach past 800K. So investing in him isn't a bad choice

As Leingod said though, ultimately up to you if you want to put in any Kais and/or effort into him.