Cheers everyone, to be honest the level scaling works just fine so playing with different levels won't be a problem (It was just too late to change by the time I found out)
As for group chat I did ask everyone what they wanted and was met with silence
I think in future it will be better if we split parties. I'll put another night up for next Tuesday and make it a regular thing, again as for levels I wouldn't worry about being the exact level as team mates...
As well as others feel free to join me if you see me playing, I'm really enjoying it and will be on most nights..