Shiiiieeeet, sins are dbs worst nightmare ft tidal. Use a vit genie. Dbs are most likely gonna try one lock per attempt before running away. Force them to burn their genie. The real outplays and fight starts after your tidal runs out and its all about how you manage your genie after that. However dont be a cheapskate and save faith/ad, if you even feel like you need to use it, go for it.
After that 45 seconds, they're most likely gonna go for the sleep>destiny hunter> annular eclipse (increases cd of next two skills you cast including genie)> dragon trap. What i like to do is faith (rather than fortify) then knife throw or single spark (if its a good db with fast reaction its gonna use dissarm immediately since it goes through faith). After faith and knife throw/single spark, the eclipse debuff should run out and you have the opportunity to reset the fight or go for kill (most likely if you get a stun on them, the db is gonna faith/ad/sutra to continue their combo. It all depends on the player).
Just gotta remember if your tidal holds up (maybe 1 in 3 debuffs will go through the tidal), the db should always be on the back foot. Imo play aggressive, its what works for me but it all depends on situation and outplays.
Most important thing is to make sure you dont use tidal when they proc annular eclipse on you (look up the skill if you need to), thats one sure way to get ***ed and end up on the backfoot.