Crab Pets - A Conundrum

For the first time in a long time I am thinking about a respec on my main, "Itsy-Bitsy Spider". I currently have both sets of pets, and both are permanent due to high recharge.

With the new proc that changes knockback to knockdown, I am looking at picking up frag grenade again. Unfortunately the only way to make room would be to get rid of one of the pets.

So, should I keep the baby spiders or the big spiders? I'm not sure how they really stack up against each other for damage, but I am leaning more towards the big spiders since they bring control to the table which stacks nicely with my wide area web grenade.

Any thoughts?

My planned new build, using the big spiders in this one, but a very easy swap to other if I can be persuaded that way.

Villain Plan by Mids' Villain Designer 1.959
http://www.cohplanner.com/

Click this DataLink to open the build!

Itsy-Bitsy Spider: Level 50 Natural Arachnos Soldier
Primary Power Set: Crab Spider Soldier
Secondary Power Set: Crab Spider Training
Power Pool: Leadership
Power Pool: Fighting
Power Pool: Speed
Power Pool: Leaping

Villain Profile:
Level 1: Single Shot -- Apoc-Dmg/Rchg(A), Apoc-Acc/Dmg/Rchg(3), Apoc-Acc/Rchg(3), Apoc-Dam%(5), Apoc-Dmg/EndRdx(5)
Level 1: Wolf Spider Armor -- S'fstPrt-ResKB(A), S'fstPrt-ResDam/Def+(7)
Level 2: Combat Training: Defensive -- LkGmblr-Rchg+(A)
Level 4: Maneuvers -- LkGmblr-Rchg+(A), LkGmblr-Def(7), LkGmblr-Def/EndRdx(9), LkGmblr-Def/EndRdx/Rchg(9)
Level 6: Wide Area Web Grenade -- GravAnch-Acc/Immob/Rchg(A), GravAnch-Acc/Rchg(11), GravAnch-Hold%(11), GravAnch-Immob/Rchg(13), GravAnch-Immob/EndRdx(13)
Level 8: Heavy Burst -- Posi-Acc/Dmg(A), Posi-Dmg/EndRdx(15), Posi-Dmg/Rchg(15), Posi-Dmg/Rng(17), Posi-Acc/Dmg/EndRdx(17), Achilles-ResDeb%(19)
Level 10: Tactical Training: Maneuvers -- LkGmblr-Rchg+(A), LkGmblr-Def(19), LkGmblr-Def/EndRdx(21), LkGmblr-Def/EndRdx/Rchg(21)
Level 12: Venom Grenade -- SDoArach-Acc/Dmg/EndRdx/Rchg(A), SDoArach-Dmg/Rchg(23), SDoArach-Acc/Dmg/Rchg(23), SDoArach-Dmg/EndRdx/Rchg(25), SDoArach-Acc/Dmg(25), Ragnrk-Knock%(27)
Level 14: Suppression -- Posi-Acc/Dmg(A), Posi-Dmg/EndRdx(27), Posi-Dmg/Rchg(29), Posi-Dmg/Rng(29), Posi-Acc/Dmg/EndRdx(31), Achilles-ResDeb%(31)
Level 16: Tactical Training: Assault -- EndRdx-I(A)
Level 18: Boxing -- Empty(A)
Level 20: Tactical Training: Leadership -- GSFC-Build%(A), GSFC-ToHit/EndRdx(31), GSFC-ToHit/Rchg(33), GSFC-Rchg/EndRdx(33), GSFC-ToHit/Rchg/EndRdx(33), GSFC-ToHit(34)
Level 22: Tough -- Aegis-ResDam/EndRdx(A), Aegis-ResDam/Rchg(34), Aegis-EndRdx/Rchg(34), Aegis-ResDam/EndRdx/Rchg(36), Aegis-ResDam(36)
Level 24: Mental Training -- Run-I(A)
Level 26: Fortification -- Aegis-ResDam/EndRdx(A), Aegis-ResDam/Rchg(36), Aegis-ResDam(37), Aegis-EndRdx/Rchg(37), Aegis-ResDam/EndRdx/Rchg(37)
Level 28: Serum -- Dct'dW-Rchg(A), Dct'dW-Heal(39), Dct'dW-Heal/EndRdx/Rchg(39), Dct'dW-Heal/Rchg(39), Dct'dW-Heal/EndRdx(40)
Level 30: Weave -- LkGmblr-Rchg+(A), LkGmblr-Def(40), LkGmblr-Def/EndRdx(40), LkGmblr-Def/EndRdx/Rchg(42)
Level 32: Omega Maneuver -- Ragnrk-Dmg/EndRdx(A), Ragnrk-Acc/Rchg(42), Ragnrk-Acc/Dmg/Rchg(42), Ragnrk-Dmg/Rchg(43), Ragnrk-Dmg(43)
Level 35: Frag Grenade -- OvForce-Dam/KB(A), OvForce-Acc/Dmg/End/Rech(43), OvForce-Acc/Dmg(45), OvForce-Acc/Dmg/End(45), OvForce-Dmg/End/Rech(45)
Level 38: Call Reinforcements -- ExRmnt-EndRdx/Dmg/Rchg(A), ExRmnt-Acc/Dmg/Rchg(46), ExRmnt-Acc/Rchg(46), ExRmnt-Acc/Dmg(46), C'Arms-Acc/Dmg/Rchg(48), C'Arms-+Def(Pets)(50)
Level 41: Hasten -- RechRdx-I(A), RechRdx-I(48)
Level 44: Super Speed -- Clrty-Stlth(A)
Level 47: Combat Jumping -- LkGmblr-Rchg+(A)
Level 49: Crab Spider Armor Upgrade -- GA-3defTpProc(A)
Level 1: Brawl -- Empty(A)
Level 1: Prestige Power Surge -- Empty(A)
Level 1: Prestige Power Dash -- Empty(A)
Level 1: Prestige Power Quick -- Empty(A)
Level 1: Prestige Power Rush -- Empty(A)
Level 1: Prestige Power Slide -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- RechRdx-I(A)
Level 2: Swift -- Run-I(A)
Level 2: Hurdle -- Jump-I(A)
Level 2: Health -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(48)
Level 2: Stamina -- P'Shift-End%(A), P'Shift-EndMod/Acc(50), P'Shift-EndMod(50)
Level 1: Conditioning
Level 4: Ninja Run
Level 50: Cardiac Core Paragon
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If I had to choose between Omega Maneuver and Spiderlings, I'll take the latter. Unless there is an upcoming change to OM that I don't know about, it's not worth taking IMHO.

Personally I'd leave frag out and keep both pets, and omega maneuver.

Because Omega Maneuver looks really cool.

How Omega Maneuver works on a level 50 team:
1) Summon Omega Bomb near targets.
2) Shoot Venom Grenade at targets.
3) Watch as teammate uses incarnate Judgement power, annihilating the spawn, leaving behind a few half-dead bosses.
4) Watch as teammates finish off bosses and move on.
5) Omega Bomb explodes in an empty room, inflicting 0 damage.

Judgement is technically optional, since a team of incarnates can destroy a whole spawn in 3 seconds flat without it.

I'd say it all depends on your style of play. I find both Omega Maneuver and Spiderlings (which die very quickly to AoE attacks) mostly useless on teams. If you solo a lot, both could be very useful. Omega Maneuver can be very impressive if you have the leisure time for it to recharge and there's nobody around to ruin it. If it were me, the most useful of these powers would be Call Reinforcements.
If you really want pets, you could get Mace Mastery and summon the really big pet (Arachnobot Blaster), and it would only cost you a couple mule powers like Wolf Spider Armor or Combat Jumping* in order to trade in something you don't need (Frag Grenade?) for the best giant mechanical spider there is.

*Don't have Mids' at the moment but I'm assuming you don't require Combat Jumping to soft-cap.

Personally I use the Coral guy, because I need Leviathin Mastery.