Why would you need ciws?
Rcws? But the turret with 30mm can do the same job you want.
No need some fancy ECM, flare, chaff etc, but some good and secure comm would be nice, smoke launcher yes its needed, if more fire power is needed then mortar launcher put it in the back of the boat, rather than RBS70, mortar would be more useful.
To maximize protection against explosive projectiles like RPG and ATGM, as well as to counter anti ship missiles. I thought at first that active protection system like AMAP-ADS or Trophy will be sufficient, but since this is a boat, a close in weapon system will be more suitable.
Besides, a CIWS should also be configurable to be used on ground or surface targets.
This is just an idea though. If the current 30 mm turret can also be used against incoming missiles and low flying aircrafts / helicopters / drones, then all the better since there will be less need for the RBS-70 onboard.
Re: "fancy" ECM: I beg to differ. Some kind of basic electronic and / or IR jammer will go a long way to ensure survivability on the battlefield. And considering that the potential opponents can be anything from local pirates to full blown sophisticated state actors and their military, it should be a no brainer to be prepared rather than waiting to see what kind of opponents that the boat will be facing first.
At the very least, the ability to have them installed on the boat is a big plus.
Agree on the secure comm, but then again, it will be better if there are also plans to include some kind of data link.