5/5 High Jump (It affects Soul Jump which is as of now the jump with highest TP return, and meriting jump is just not worth it seen how few secs it takes off)
5/5 Spirit Link (Wyvern MUST stay alive!!)
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5/5 Deep Breathing (A cure V (with proper HB gear) every 5 mins? Yes please!)
3/3 Angon (For zergs)
2/2 Empathy (For at least two buffs on your wyvern)

This is what I merited on DRG back in 2007 and never felt the need to change them. Hope it helps^^