Using KA the main issue for rogues seem to be mq2melee's /stick-settings to get into the right position. Spinning in place or humping a wall seems to happen frequently out of the box.
That said, I've tried out some settings and I'm "decently" happy with the following MQ2Melee setting for my rogue (configured in server_character.ini in the main Redguides directory)
[MQ2Melee]
assassinate=1
backstab=1
disarm=1
enrage=1
evade=1
facing=1
infuriate=1
melee=1
pickpocket=1
plugin=1
resume=75
stickbreak=1
stickrange=30
stickcmd=!front 75% moveback uw loose
version=8.802
On raids/big groups assisting sometimes is a pain, so on my main character I made a social hotkey:
/bct <rogue> //assist ${Raid.MainAssist}
/pause 2
/bct <rogue> //nav target
/bct <rogue> //attack
/bct <rogue> //killthis
That usually helps, though sometimes it still gets stuck trying to get into place before even starting to attack. For the rest I use dps-like posion when I can, I know most people don't bother with it on a TLP but all small bits help, and don't forget to use the melee auguments (though I use healing ones instead of dps/stun)