Ships & Modules

I fly an Armageddon , cruise missle / drone boat. It's a damn good lvl 4 ship. May just have to play around with an armor tanked TFI fit.

Actually I prefer to use cruise missiles on navy phoon. It does have some advantages over rattle also when flying solo but I would not go as far as to hand out clear "universal winner" ticket to either ship. Some advantages for the navy phoon:
(1) It has the largest "alpha" damage from all missile BS hulls. Meaning there is more targets you can one volley with proper management.
(2) Increased agility and mobility can be relevant in some missions and/or depending on how you use it.
(3) Marginally larger dronebay allowing you a little more options and / or replacements. In some situations a flight of t1 lights is like lizards tail. You kick em out and bail when elite frigs switch to them.
(4) Slightly better sensors. If you kill fast enough for your lock time to matter it's nice addition.

The first point is the key advantage which should not be overlooked as it can offer substantial time difference in completion time if properly utilized.

On the other hand rattlesnakes sentries are pretty nice and can make it behave more like a gunnery platfrom than a missile platform by granting it ability to pop frigs at distance. Typhoon can do it as well if fitted for it - it's drones just lack the damage bonus so depending on target it can take an extra volley.

A note about EFT damage numbers. Rattle wins there most of the time (usually becasuse people just throw a gecko in there and ignore questions about its damage application). However, a EFT dps number is more like a rough ballpark for first guessing ships performance in PvE and reality is far more complex than this one number. What does matter, at the end of a day is how many minutes has passed since you undocked with your accepted mission until you are docking again. This depends on a lot more factors than just the dps number, one of the key factors in there is in my opinion actually your preferred tactics and particular setup picked. Will you micromanage aiming to squeeze every last ounce of performance out of your ship or will you sit there semiafk just ticking away at your targets with drones and fof missiles with just occasional nudge, for example.

Rattle has about equally nice list of advantages over navy phoon ofc :)

In my opinion it's not really worth it to use the additional gun slots on a missile navy phoon as one is usually better off with a drone link for making sentries viable outside ~50 km. 5 sentries at ~75 km are better than squeezing in 2 guns. Now if one wants to go full out with guns it's a bit different talk. Not that I would know much to say at first as I have not used mine with guns. I believe I do have the smallest CPU footprint pulse laser in one of my hi slots as not much else would fit (for grabbing agro and for drone triggering when having sentries assigned to one of phoons from other ships).

Mine run into CPU issues to the point I need to use some faction fittings for CPU reasons so I really do not have that much fittings left to fit a real gun in there. Rattlesnake is not quite as tight for me but I ofc have some CPU issues with that as well.

Warp speed rigs, missile rigs and drone rigs all have CPU penalties and these are the ones that usually benefit the missile / drone based mission-running ship the most.