I used supreme magicka for 5 secs, after i noticed how much weaker it made all my spells i was like "**** this!" But i used to use it.
I should maybe try LAME again, i used it for a while but i didnt notice too many changes.
As for Doc Magic, i downloaded it a few days ago but never tried it, didnt really like the idea of using rings for magic.
Supreme Magicka is not supposed to make your spells weaker. If anything, they will be slightly more powerful. I remember having some problems with SP the first time I tried it. I mananged to solve them all by looking at the ini file. SM is very customizable so, if there is something you don't like about the mod, there is a good chance that it can be fixed by messing with the .ini
About LAME, the most noticeable thing it does is making the duration of defensive spells longer. As much as 4 times longer actually. Also, it adds some new spells for you to play with. Some are pretty useful.
Another option that I forgot to mention is 'conduit magic'. This mod is not about adding spells or modifying the existing ones. what it instead does is to allow you to enchant your weapons with yout spells on the fly. So for example if you have a spell of fire damage 5 points selected and your equipped weapon is a sword, you can channel the power of the spell into the sword to deliver 5 points of fire damage with each blow. Tha magicka you spent is discounted from your magicka bar.