Tornado shot endgame bosses and shaper viable ?

Hi guys i'm playing deadeye tornado shot. 6L full 20 20 gem, second 5L is siege ballista. My current DPS of ts is 43k w/o flasks and charges and siege ballista is 30k. Crit chance is 45%. My HP is a little bit low (4k5 HP at lv87 atm). So i wanna ask you guys if my build will be shaper viable ? Any advice for flask setup ? Currently using reach and kintsugi. I wanna try endgame bosses and the shaper so bad but idk if this char is good enough. ( btw i'm bored at using barrage as a secondary skill to kill bosses.)
Hope u guys can give me some advice. Really appreciated.

My 6L are ts-add fire-pierce(using drillneck)-phys projectile-faster attack-slower proj. Should I replace with sth inc crit chance ?