I've been playing nothing but 300 point games for over a year now and would like to increase the build total to 500 +. So im going to be working my way up there.
Here's a team at 400 points.

Excalibur
Juggernaut 193
Psylocke 74 +Hand ATA 7
Nightcrawler 86
Cypher 38#
398

I know there isn't a whole lot of range on the team but between Nightcrawler being able to carry and psylockes TK + both of them having stealth I'm not too worried about range.

Generally I'm not looking for cheesey team building guidlines just want to build formidable teams I can play against friends that normally play those kinds of points.

Thanks for all help and tips given

Well, I would say you have a pretty solid build for your goals. I can't really think of anything I would change.

Good to know I'm on the right track
Maybe jumping ahead of myself a little here but I've come up with this team for X-men.

Cyclops 105
Beast 95
Archangel 99
Dark Phoenix 100
Nightcrawler 86
Wolverine 100 + automatic regeneration 12

597 point total.
Really tempted to play this team over an avengers team I have ready for a 600 point game with a friend.
Any thoughts on Cyclops for this team?
I enjoy using this one (tabapp) as he feels more offensive than the GSX version, though the GSX version does have the perminent Leadership via trait and the healing boost for the X-men TA.

Another solid team. The Tabapp one is better offensively but I think the healing boost of the Gsx one is a game changer and more beneficial than extra offensive output. So I'm taking the gsx one at 500 or more points until he's retired.

Nightcrawler will not make your friends think you aren't being cheesy I avoid him in friendly games.

@jonidschultz You have a good point. My team, as I see it,is a little squishy so the healing will help greatly. Just got to find a way of squeezing him in there.

@Pantshat In a 400- point game I'd agree with you. But higher than that I think he loses alot of his effectivness with a 10 ATK. At the point level there playing at normally they like to showcase there 250+ point characters. And I can't say that I blame them, they've payed for them after all. At that level your looking at 18 DEF against his 10 ATK. Odds I don't like. I know I could add characters with perplex/prob to make him more effective but then I'm just building a kill box team. I'm not against using kill box but I prefer it as a tactical option as opposed as the main stratedgy for my team build.
As is, I think he's much better suited as a support killer/ brick harrasment as well as being able to get characters where they need to be. Sides my chums won't be too worried about him when there rocking thanos and the like lol.

So now I'm gonna go away and try and figure how to get GSX Cyclops on the team without losing the effectivness of the rest of my squad. Suggestions greatly appriciated as I'm a little stuck lol.