For farming: 49 Suppression for last PBAoE. The rest of the points don't really matter. Either darkness for some lifetaps or summoning for pet buffs. But you don't really have enough points to do much with a second line. The best you can do with 49 suppression is going 22 in a second line. too bad its not 23 because than you could get rez at 23 summoning, but not enough points =/
For RvR Solo: (my spec) 47 Darkness For last LifeTap 26 Supp: lvl 26 PBAoE for popping stealthers. Lvl 23 haste debuff lvl 25 strc/on debuff and lvl 24 single target mezz (longest duration mezz you have) 5 Summoning: leftover. Group: Debuffer: 19 Suppression for DeMezz and darkness minimum 47 for last LT, but it depends on the resist you want to debuff, so you might want to go higher. PBAoE Group: 49 Suppression Rest darkness for D/Q Debuff.
This is just my opinion. Hope it helps ~Bombzz
edit: I run a minimum of MoF1 so that the LT is 50. But I usually run MoF 2 to help my utility spells. It's 2 points well spent.