I find RP Pokemon in general to be underwhelming. Yeah, it helps with their shitty speed, but it doesn't boost their power. I know they all have >100 base Attack, but without a boost, they usually won't be able to OHKO all the things that will OHKO back.
Absol should be moved up. Good Swords Dancer, good Scarfer, good movepool, good ability, good base attack, good everything.
I personally think Umbreon should be moved up. I once thought I had a game in the bag when I was up 4-1 until a Wishing Umbreon started setting un-phazable Curses. Once my Venomoth was dead, I knew I had no other way of taking it down and lost. As this shows, when you combine Curse and great Sp. Def, you get a stalling monster on your hands that will eventually dismantle your team with boosted Paybacks. You can also run Sucker Punch for surprise factor and to annoy revenge killers. It also gets Heal Bell for getting rid of status on your team, which has great synergy with Synchronize, allowing it to be a great status absorber while inflicting it back at your opponent. It also has Baton Pass for passing away the Curses and Wish for some team healing.