Who to SIG 200?

Yesterday I finished Carina's Challenges so I got myself the awakening gem and also I now have enough signiture stones to take another champion to sig 200. I am torn between awakening and taking to sig 200 either Knull, Tigra or Valkyrie. My only other options I could consider are maybe Omega Red, King Groot or Guardian (I already have the last 3 awakened already).
Who do you reckon I should go for? (Also I am open to other suggestions)

P.S.: I run suicides. Also I am F2P so sigs are quite rare for me.

Roster:

Comments

SirGamesBond

Suicides = Either OR or knull
Diablo too

Axew

Omega Red sig 200 + suicides would be nasty

Captain_Spasm

Knull has big benefits from high sig as an attacker and defender. Adding that to his multiple resistances and the fact he can counter all evaders and auto-blockers, he’s a great choice.

Marvelfan30

Groot

Lpoo

Kamala plz

AMS94

If u are great with Tigra then there is no better investment
If not then I'd advise going with Knull, specially if u run suicides regularly
Thing is another one that will add great value if u care about Battlegrounds

Also I assume ur Hercules is already sig 200.....if not then first I would take him up

DonDudu2809

If u are great with Tigra then there is no better investment
If not then I'd advise going with Knull, specially if u run suicides regularly
Thing is another one that will add great value if u care about Battlegrounds

Also I assume ur Hercules is already sig 200.....if not then first I would take him up

Yes, herc doom and ghost are sig 200 already

DonDudu2809

The reason I was a bit sceptical with Knull is that if I sig 200 him I will also take him to R4 and I already have 4 R4 cosmics out of the 6 i have in total.😆
However I am leaning towards him now.

Moosetiptronic

Go with who you enjoy. I run suicides 24/7 and my first sig 200s were diablo (after herc) and omega. They benefit from it a lot.

I also have duped KG, Knull and Angela and have been debating who to R4 next and sig 200; it's a really tough question. I'm leaning towards Knull too, but may wait until 8.2 drops to see who'd be more useful.

Also, I could see the value in awakening king pin.

Also, if you run ouchies, great roster; Ultron, iabom, omega, Angela, monkey, hype could so do with some rank up love 😉

(By the way, how much use do you get out of og black panther? Been mulling taking mine to R3 to run with herc)