If you want damage - go lazers and AC that spreads the damage *much* less. drills through armor and components much, much better.
If you want stab dmg close range, go big ACs.
If you you want to be able to fire while being more than just face to face with a mech - dont go SRMS still, along with the above drawbacks on top.
If you want to sandpaper armor for some reason, or go for an armor destruction high score - go SRM.
Sure there's more chances of rng component/gear crits, but is that really worth sacrificing the ability to punch straight through mechs with 50dmg - 100dmg single component hits, while doing almost no damage to anything in paticular? You're spending much need turns looking for crits and knockdowns, meanwhile the mechs mid - late will start pilin
Missiles seem really weak, am i missing something? Lucky LRM has such long range and indirect fire, what do SRMS have?
In MWO this is balanced because you have to actually aim, so there was no guarantee of lazer and AC dmg hitting single components, but here i.e an ac/20 is 100 dmg on a single component, every time it hits. And is decent range.
I have an ac/20 and a med lazer or 2 on my main 2 frontline mechs, with SRM just to fill the gaps, that have mostly missile hardpoints and not so much ac/lazer hardpoints (hello centurion), and im trying hard to find an excuse not to slap an ac20 on my 3rd front mech and run basically the same setup with all 3 at the front.
Halp.
(And if it wasn't ac/20 specifically, it'd be other ac and lazers in general.)
P.S Long range missiles are great - a Centurion with a PPC, LRM20 and 2 tons of ammo ftw!