Archon vitality is usually a trap. It sounds really good on paper, but in reality, there are only a few cases where its worth. Dont get me wrong, its really good when it works, but not in this case.

In order for it to be worth, you need to be able to proc heat like a dozen times/sec or proc a very strong heat instance. Neither is the case with Neutron star. Heat only procs once on recast and its damage is not boosted by ability strength. Think of the heat proc as a free -50% armor rather than a damage dealer.

Regarding Ocucor, I see your point that it could be hard on higher level to ramp up. Luckily, this is warframe and we have many ways to boost it.

Heat is actually not good in this case. Heat is the best when it comes to single target damage, but Ocucor is an aoe weapon and as such, we should focus more on aoe. I recommend a gas build. Your goal is to kill groups of enemies not a single one; gas will outperform heat easily. (Not to mention because of heat inherit, its not a good idea to run heat, since the first proc is weak but I digress…)

The problem with gas is that it doesnt perform very well against armor, so you should add some armor strip to your build. For casual armor stripping, Id recommend Jade‘s Ophanim eyes. Long duration, minimal effort to keep up just not the fastest strip.

Then you can offload viral to your companion for more damage.

For gas, its also a good idea to run a bane mod, because gas triple dip faction damage. Might be annoying to swap around, but for endurance run, its worth it.

Grouping is another way to take advantage of the gas cloud. For passive grouping run Nautilus.

About Redirection, I gave you 3 flex spots for that exact reason. Just put w/e mods you like. You might want to put on a couple strength shards to reach 50% strength though. Power drift can also be slotted if needed.