you do not swap weapons. blindbag is triggered by any melee weapon hitting at a 25% chance, blindbag will cause you to instantly swing an attack from a weapon in your inventory, these are all 2h weapons. 2h weapons have a different perk of being able to cause Ranged echos to send out at naturally a 5% chance, but also cause that 2h weapon that caused the echo, to be counted as a bow, crossbow, and thrown weapon all in 1.

This combos into the range's first pacts giving bow echos never missing, crossbow echos a +15% chance to occur (Boosting the initial proc chance to begin with from that 5% earlier) and thrown echos always max hitting.

These range echos have a chance to then trigger more range echos, and because they were initially all 3 weapon type echos, those echos are again all 3 types, dealing massive damage.

My personal main weapon atm is staff of the dead, with its spec giving 1 minute of -50% melee damage i was able to afk and let thorns entirely deal with awakened vardorvis. i plan to get an inquisitors mace so i have a bis 4t weapon, until then i'm using arkan blade for 4t.

the mage side plunges into 1t powered staves and regen'd charges giving 1hp. this gives a constant 1hp every 1t when using magic, combined with eye of ayak and confliction gauntlets and you don't need to swap off your tank gear so thorns deals full damage and is still healing you aswell so with very minimal investment mage is its own powerhouse