I've just played some Unranked matches and learned that you'll need to use dual SW + GS so your mobility to disengage are F1, F2, GS3, SW5, F3 with increasing cooldowns. Using Restorative Virtues trait, the Alacrity somewhat reduces the cooldown for everything so you can rotate out when pressured. The idea is to run in for group battles, dish damage with GS2, SW2, SW3 then retreat. Seems to work so far in Unranked play but haven't tested in Ranked enough times, only 2 matches.
In any case it is still very restrictive against classes that have many CCs (e.g. Necro) or are quick themselves (Engineers, even Mechanists) who can chase you down even with this setup. We can only hope the next balance patch improves things.