Just my 2 cents...
Two days ago I finally had the $C-bills$ to buy the second of the 2 x AC/20s I needed to make this mech (which was originally why I bought the K2). Sure, the feeling of dealing that damage is...without description
I enjoyed this aspect. But as the OP must know by now, the lack of speed makes you awfully vulnerable and makes it challenging to position yourself appropriately to use those mean cannons. In fact, more often than not, in PuGs I found myself either under attack from afar and unable to respond, or simply pinned down by the long range mechs...again, without the ability to give them any hassle.
Personally, I found I can actually do more damage if I:
1 - use the stock 260 engine and get back to being a mech that can maneuver a little
2 - use only 1 AC 20 (3 tons of ammo I think, cant remember)
3 - mount 2 large lasers to melt a few fools on my way to a position to bring the AC/20 to bear
Truthfully, I think it is the lack of speed alone that makes piloting the 2x AC/20 a dangerous proposition. Adding the 2 LLasers was the way I went, but it seems like there is a little room to work with here for energy weapons.
Slow might work ok for an assault mech, but the K2 can't afford to move/turn so slowly IMHO.
edit: I guess I have to add also that I am used to playing medium mechs (I have a centurion collection) and thus learned to play the game with semi-maneuverable mechs. If one is used to playing the slow assault chassis, the slow dual ac20 cat might work better for you than it did me.
Edited by Pan Damonium, 31 December 2012 - 02:51 PM.