If you're going for a solo build I don't think 25 SPR is essential unless you want the crit rate. I did use 25 SPR for the crit rate, but I also went for the SP which I needed since I went for a support build.
25 points is a lot... I think STR/END build is ok. But I'm not a solo cleric so don't take my word for it, just my opinion. xD
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