Thank you very much for replies and especially dreamlitz for putting so much effort into clarifications. On the 'continuous damage' for Vishnu, I meant when she is on the receiving end.

You mentioned that Iris' debuff can miss, yes, but with Vishnu, it's the equivalent to guaranteed miss 'cos she doesn't bring any at all
If this was merely a miss it would be ok. However, it is also -20 BG on a char you want to start bursting as soon as possible. A lot of times it is a question for me - burst on t3 or debuff. I could use Tish buff on her to make sure I have enough BG for both, but than Mike is too slow. Perhpas should have mentioned I don't have Shingen yet ><.

Also, I have learned the hard way, that Sol echo healing overwrites the 10 turn regen from normal accessory set. So, here is a warning for anyone intending to burn your precious magnas on her for that purpose...

For now, I'm comparing the Lugh/Iris, Tish, Mike, Sol to see what works best for me. Thanks again for help.