hey 
I come back after a break( a long break) and i have a question:
I want to tank in secret world i love chaos and shotgun but can i tank with this 2 " spec"?
Witch combo is the best whith Chaos?
thx
Before saying too much there’s actually a terrific guide for sustain tanking on the forums in the orochi section that you might want to look at. I think it focuses on hammer main as this is perhaps the easiest style of tanking starting out. Personally I started hammer/chaos and transitioned to chaos/hammer since I enjoy chaos more as a weapon. As for chaos/shotgun that is a fairly challenging combination for sustain tanking. So at the very least you might want to start out chaos/hammer and then experiment with other combinations as you progress.
Link for your reference Sustain Tanking
Shotguns tanking lacks hard. Its tank CDs are lacking (30ish% heal or a taunt to put it mildly and while it is your offhand it’s passives seem to operate on the principle that defensive glyphs are something other than shard fodder.
You’re probably better off bringing a hammer offhand for the better CDs, or even if you use the offhand to swing pulverize actually helps tanking out the box with no passive.