In PvE bounty hunting combat you will get more
practical shield protection by using Bi-Weave shields and building for resistance and regeneration over raw strength.
It's generally pretty easy in PvE to control when you're being shot at by clearing all currently active targets and setting yourself up for a favourable attack on any new target, so you will have plenty of time to regenerate shields between individual combats, and for every second of that time you are gaining 4 more points of shield back with a Bi-Weave shield as you would with a Prismatic.
Consider the following adaptation of your build:
A ship builder, outfitting and comparison tool for Elite Dangerous
s.orbis.zone
It gives you more actual resistance against thermal weapons, which the AI likes and is most accurate with, and over the course of any average bounty hunting mission you will have gained enough extra regeneration to have absorbed more kinetic damage than Prismatics would have allowed as well despite having, on paper, half as much shield against them.
Weapons are up to you, I've put in what I would start with to use PAs on an Anaconda (the aim being the top to L and M slots should have okay convergence so they all hit against most targets), but I've not tested how they would actually work in practice in those slots.
You won't overheat with that build either, unless you fired your weapons or boosted at the peak heat of the SCB. SCB alone almost certainly wouldn't overheat you, especially not in an Anaconda which has good heat profile.
(Long term I'd probably sacrifice some more of the guardian shield boosters for 7A Dirty/Drag Thrusters, the more you point your guns at the enemy the quicker they die and the less damage you take, thrusters help with that).
Something like this, maybe:
https://s.orbis.zone/g4mr