I feel like you're trying to do everything, and it never works out, particularly in Seeker play, because the opening rounds of combat are so incredibly vital. You need to specialize and rely on your party at that level to cover other avenues of attack/defense.
I'll toss in that a +22 in Sense Motive isn't going to do you much as you enter Seeker level play. It'll help from time to time, but it isn't worth the 3 feat investment if you aren't using skill focus and Inquisitor's Monocle, and possibly getting alertness through the ioun stone too. My brawler which uses the full Snake Style tree had been around +35 entering seeker level play, and hits +42 or so at level 15... and that sometimes isn't enough. He has fairly similar attack bonuses (a little higher since he has a couple levels on you), but he also can drop 6-7 attacks a round, and do the same amount of damage as you're doing with a 2-handed weapon (and has been able since he started being a Seeker).
In short, if you're serious about seeker play, consider this... Seekers are the cream of the crop, they specialize and rely on their team's specializations to get them through things. You can't be the whole party and be good enough to keep up at that level. I'd recommend finding something you want to focus on and pushing HARD at it, maybe retrain a little bit to help narrow your focus if you want to take this character into Seeker levels. Even as nice as my seeker is, it isn't uncommon for me to scrape by in some fights. Otherwise you're going to start running into combats fairly regularly where you just can't make much of an impact.