Please keep doing this; I love all the loaner Sentries I’m seeing today, 20k less health to chew through, and those powers merely scratch.
Yours gratefully,
CT
Ps every 3* is worth Championing.
You know you don’t have to use his powers in battle right? 
For me it’s a 2v3 and I’ll use Sentry’s powers out of desperation. Right now he’s just an 18k meat shield.
Sentry is better than given credit for. Cast green, cast strikes just before it goes off. Those that like Hawkeye speed shot are missing the same effect on steroids. For those that play Phoenix/OML, cast Phoenix Red and OML Black when world rupture shows 1 on CD tiles and watch 30k-50K damage on the other team.
even if you don’t use his powers he makes a great bullet sponge
Yep, climbed with the loaner Sentry, thanks to the reasonably strong Sacrifice strike tile.
To add to the advice in the posts above, bring the C4rol along for insane World Rupture special-buffing.
In my mostly 3*/4* enemies realm, the highest HP is about 22K. Drop a champ Sentry strike just before WR, and this can damage each enemy for up to 12K+ (depending on how many CD’s stay on board).
Oh, and I like Ragnarok. Again, drop the sacrifice strike after gathering 12 red and some blue. Two Rags red shots spams enough blue to blow things up nicely, then Rags blue charges green tiles to acquire for WR. If no C4rol, bring along a helpful purple/black user (Blade/Mystique/Loki/etc) to round out active colors.
Great thing about Sentry…if he even has 1 health left…start the next fight! 
I haven’t used any health packs on him yet. Or fired any of his powers. Or had him tank anything for Cyclops or X23.
Not everyone (i.e. free-to-play players) has the luxury of rostering every single character. They have to pick and choose who to roster based on their available slots. Many other characters seem more appealing than Sentry or Ragnarok, I’m sure.
That said, I haven’t seen one loaner Sentry yet in my playings. Glad I have him champed.
If you bring a strong shield tile generator with Sentry, and someone to heal him, he’s actually pretty effective. That strike tile is vicious, especially when boosted, and it doesn’t take a heck of a lot to shield you from his friendly fire.
But he still sucks.
In almost every single PvP event, why not just spider-gwen ice/man the enemy team?
She’s boosted this week, so her Cherry bomb really hurts. Six blue on ice man freezes one, her stun seems to always target the other two. I haven’t had a problem just stun locking most teams.
Additionally, you can use two blue/purple stockpiles to makes sure you get an early start, and if you’re super worried about it, drop two prismatic stockpiles.
I’d never actually looked until this. The very first one I looked at was running champed Cyclops/X23, had about 20 champed 4s and every other 3 Champed (except Thanos), but no Sentry rostered.
I’m up against 4* champ teams/level 360-400 5* teams, so very well developed rosters where roster slots shouldn’t be an issue. I’m just seeing so many more loaners than in any other event that it’s really noticeable.
I like Sentry and Rags.
I used Sentry in PvP usually first thing so he can deal his damage, and then I let him heal.
Personally I love Starfall because I do have a rostered Sentry.
Is this really true? Rostering yes, but hamping? I have 28 champed 3*'s, 8 4*'s. Even the 3*'s I have at 120-130 are 100k to champ. My best 3* in a year of champs is 213 - not even 50 covers. It seems like too long term of an investment to delay more 4* (and with luck 5*) progress for the rest of the 3* champs.
Yes.
Champ rewards.
Plus at 266 and boosted, some 3s start to pack a mean punch again.
In the long run, absolutely. The good threestar champion rewards all come towards the end - once you get to the second fourstar cover things get a lot better very fast. If I had to pick between making four threestars champions or just one fourstar, I’d go with the threestars unless it was a gamebreaking fourstar that I’d actually use a lot.
I’m still not crazy about Sentry, but I had some amount of success letting Kamala build up temporary hit points and then using Sentry as a finisher, letting his power eat into temporary hit points instead of real ones. For the first part of the fight, he’s a glorified meat shield, though.
Ditto to all this. My Champ Sentry sits in the corner while my Champ X-23 and Champ 4* Cyclops do the 900 pt climb, then shield.
Coming up with Sentry strategies for effectiveness is like using the flames of your burning house to cook food. You did something somewhat useful, but the situation still sucks.
On the plus side, Sentry does give out Moon Knight covers now, so it pays to champ him. Makes sense, they probably shared a therapy group.