Thanks for all the input :)
The disruptive feat says "DC to cast spells defensively increases by +4 for all enemies in your threatening area."
Brawlers's menacing stance feature says "While adjacent to the brawler, enemies take a –1 penalty on attack rolls and a –4 penalty on concentration checks"
can someone please explain to me the differences between a "cast spells defensively" check and a "concentration" check?
Also, Normally I can only make 1 opportunity action a round correct? But if I take feats that let me take more then 1 can I use them on the same turn against the same monster?
Also, my understanding of the rules if very very poor, but LazarX said all I had to do was ready a power attack. If I did that wouldn't the monster just step back 5 and then cast their spell while out of range of my Power attack?
Last thing, Are monsters that cast spells with cast times common? Does a caster have to do any of these checks if the spell is instant speed?
Thanks again