Greater Dragonmark of Sentinel - Worth it?

[T.T]

How much worth investing in Greater Dragonmark of Sentinel feat? I am a Human Rogue and i am in doubt about his worth... "An immobile magical sphere surrounds you and excludes all spell effects of level 4 and lower".

Is it good enough (or helpfull) in later levels? Or do i finish my tier with "Greater TH Fighting" instead? (i already have TH and Improved TH)

ty

[Valindria]

I'd say no. The only place I have seen it used is HoX due to bees breath. Even then people are using the Staff from ADQ to cast it. I assume it's the same spell.