| Are |
Flurry of blows already essentially grants the benefits of Imp.TWF and Greater TWF (ie: extra attacks at -5 and -10) at levels 8 and 15, respectively. At least when comparing the FoB attack sequence to what a TWF-fighter would have at the appropriate levels.
See 20th level, for instance: 2 attacks at level-2, 2 at level-7, 2 at level-12, and 1 at level-17.
As such, it wouldn't really make sense if you could take those two feats on top of flurry.
| Quandary |
@Are: check the OP: he's talking about a MULTICLASS monk.
if you're fully progressing thru monk, yes, you don't need 2WF feats,
the only thing they would do would let you 2wf with non-monk weapons
(but lagging behind flurry since your official BAB is 3/4 while flurry uses full BAB)
@OP: per RAW, no. it works like 2wf, but you don't have the feats.
personally (houseruling), i would fully allow it to qualify as having 2wf/Imp2wf/Grt2wf,
so that you can take (and use while flurrying) feats like 2 weapon defense.
any such 2wf feats can be taken as if your BAB counts your monk levels as full BAB.
any such '2wf pre-req' feats you take wouldn't be usable if you don't meet the pre-reqs for monk flurrying (i.e. uas/monk weapons, etc). the double slice feat would be superfluous for monks, since their off-hand already deals 1x STR (although an interesting house-rule would be to say that monks that take double slice INSTEAD allow their main-hand to benefit from 2handed DMG bonus if they wield a 2 handed weapon for the main-hand).
| Pirate |
Yar!
...and let's not forget the poor Sohei - who can flurry with any weapon he has weapon training in (including two-handed reach weapons) - who has the unfortunate visual (and mechanical mess) of being on a horse, flurrying with his long-spear vs foes 10' away, and half of his flurry attacks need to be kicks to the air beside him. :/
~P
EDIT: sorry, that was all somewhat off topic. As to the OP, by the Rules (regardless of the "clarification") the Flurry of Blows ability does not count as TWF for acting as pre-reqs for other feats.
Though really we just have to wait for the final, official FAQ/Eratta/Blog/Clarification/whatever from the Devs before we will know 100% for sure what is going on.