I've been in a few situations where if there had been a little more intercept on Shadow Sentinel, someone would not have been defeated. I think it would be interesting if there were a few choices for intercept percents when the spell is first used. What if you could use between set values such as 20%, 25%, 30%, or 35%? This would help survivability across all wizards, and give more options when they're needed. The percentages might need tweaking, and maybe there's a different way of doing this too.