Tempered Will has limited uses but it is very useful especially on Misser, it basically remove your weigh'd status effect from Misser's Bad breath, very very important to get into position quickly when Misser moves so you do not MPK your party when Misser.

Sentinel is very helpful i never see anyone complaining about it, it can serve really well as oshit button, especially when it comes to bosses and you do not have enough time to evade it, you either pop Sentinel or Aegis Boon, saves lifes.

I agree acc was an issue, i already starts to wear double acc rings though, so far have no issue at all sitting at 400 accuracy.

For Riot Blade, i would love positional correction but it's still fine as it is just now. It does 300-400 to Chimera, so i don't even need to combo it for it to be useful. It's a strong WS to begin with.